HomeMy WebLinkAbout01. PH Water System 2019 Public Health Goals Report - Adopt ResoItem No.
APPPIOVED BY
CITY MANAGER
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: OFFICE OF THE CITY MANAGER
BY: DELFI NO R. CONSUNJI, P.E., DIRECTOR OF PUBLIC WORKS/CITY (NVGIN
DATE: JANUARY 14, 2020
SUBJECT: RESOLUTION APPROVING AND ADOPTING THE CITY OF DOWNEY WATER
SYSTEM 2019 PUBLIC HEALTH GOALS REPORT
That the City Council conduct a public hearing and upon conclusion, adopt the following
resolutiot:
A RESOLI[�TION OF THE CITY COUNCIL OF THE CITY OF DOWNEY APPROVING
AND ADOPTING THE CITY OF tWNEY WATER SYSTEM 2019 PUBLIC HEALTH
GOALS REPORT.
XMI;1i 1
The California Health and Safety Code (HSC) requires public water systems serving more than
10,000 service connections to prepare a Public Health Goals (PHGs) Report every three years
that provides information on the "detection" of any contaminants in the public water system
during the previous three calendar years that exceed the PHGs for those contaminants. The
purpose of the PHGs Report is to provide water customers with access to information on levels
of contaminants that fall below the "enforceable mandatory standards" such as Maximum
Contaminant Levels (MCLs) but above the PHG level.
mvlmffil���
MCLs are established by the United States Environmental Protection Agency (USEPA) and the
State Water Resources Control Board Division of Drinking Water Programs (State Water Board)
and are the regulatory definition of what is safe for human consumption. Adopted MCLs are the
criteria utilized to ensure that a public water system is in compliance with drinking water
etandards.
PHGs are "non -enforceable goals" established by the California Environmental Protection
Agency (Cal -EPA) Office of Environmental Health Hazard Assessment (OEHHA) and are not
required to be met by any public water system. In situations where OEHHA has not adopted a
PHG for a particular constituent, water suppliers are to use the Maximum Contaminant Level
Goal (MCLG) adopted by the USEr in place of the PHG when preparing the PHGs Report.
PHGs and MCLGs are based solely on public health risk considerations. None of the practical
risk -management factors that are considered by the USEPA or State Water Board in setting
drinking water standards (MCLs) are considered in setting PHGs or MCLGs. These factors
CITY OF DOWNEY WATER SYSTEM PUBLIC HEALTH GOALS REPORT
JANUARY 14, 2020
PAGE #2
include analytical detection capability, availability of treatment technology, benefits, capital
costs, and on-going operational costs. PHGs and MCLGs are, or may be set at, very low levels
where health risks are very low, if not zero. Determination of health risks at these low levels are
frequently theoretically based on risk assessments with many assumptions and mathematical
extrapolations.
The City of Downey Water System 2019 PHGs Report (Attachment A) was prepared in
accordance with the above noted requirements and was made available for review on the City's
website, and at the City Clerk's office, and Public Works Department counter. A list of all
regulated constituents and their MCLs and PHGs (or MCLGs) is included in the PHGs Report.
Also included are the numerical public health risks associated with the MCL, PHG (or MCLG) of
each constituent detected, the category or type of risk to health that could be associated with
each constituent, the best treatment technology available that could be used to reduce the
constituent level, and an estimate of the annualized cost of a treatment system.
The water quality data collected from the City's water system between calendar years 2016 and
2018 for the purpose of determining compliance with drinking water standards were considered
in preparing the City's 2019 PHGs Report. Such water quality data were previously
summarized in the City's 2016, 2017, and 2018 Annual Water Quality Reports (Consumer
Confidence Report or CCR), which were made available to all water customers by direct mail
and/or on the City's website before July 1St of each subsequent year.
Constituents Detected that Exceeded a PHG or MCLG
The following constituents were detected in one or more of the City's drinking water sources at
levels above the PHG, or if no PHG, above the MCLG:
Arsenic (mg/L)
0.010
Tetrachloroethylene [PCE] (mg/L)
0.005
Gross -Alpha (pCi/L)
15
Uranium (pCi/L)
20
Lead (mg/L) — Action Level
0.015
Total Coliform (% Positive
5%
Samples)
1.73
Notes:
0.43
mg/L - milligrams per liter (1 milligram =
0.001 grams)
pCi/L - picoCuries per liter
0.0034
CC — corrosion control
(0)
D - disinfection
D
GAC - granular activated carbon
RO - reverse osmosis
PHG or
Detection
Best Available
(MCLG)
Average
Technologies
0.000004
0.00119
RO
0.00006
0.00025
GAC
(0)
1.73
RO
0.43
2.1
RO
0.0002
0.0034
CC
(0)
1.36%
D
2
Quality of Life, Infrastructure & Parks
Public Engagement
K
GITT OF DO
JANUARY 14, 2020
PAGE #4
FISCAL IMPACT
Aw 61 lei I I r-1 VS; 1-12 r-10 III I r -1A M OITA 4 A Izz bi'l� I i - 0 W N &1*16141 KI (ZIS RVA I IBM
ATTACHMENTS
Attachment B — Resolution
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9252 Stewart and Gray Road
Downey, 90241
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The 2019 Public Health Goals (PHG) Report for the City of Downey Water System has been
prepared in accordance with Section 116470 of the California Health and Safety Code,
to provide information on the "detection" of any contaminant(s) exceeding a Public Health
every three years thereafter.
The City's 2019 PHG Report is based on water quality analyses completed during calendar
Vears 2016, 2017, and 2018, or in cases where water quality analyses during such years
were not required, by using the most recent data available.
PHGs are "non -enforceable goals" established by the California Environmental Protection
Agency (CaIEPA) Office of Environmental Health Hazard Assessment (OEHHA) and are not
required to be met by any public water system. OEHHA is the primary state entity
responsible for the assessment of risks posed by chemical contaminants in the
environment. In situations where OEHHA has not adopted a PHG for a particular
constituent, water suppliers are to use the Maximum Contaminant Level Goals (MCLGs)
adopted by the United States Environmental Protection Agency (USEPA) in place of the PHG
for that constituent when preparing the Report. MCLGs are the federal equivalent to PHGs.
•!• aDel 1! 11 L 14 Iffill-I I III I'll t
when their levels are detected above PHGs or MCLGs even though the levels are still in
compliance with the enforceable mandatory drinking water standards referred to as
Maximum Contaminant Levels (MCLs). In addition to providing information related to
water quality, this PHG Report also includes estimated costs to hypothetically reduce or
eliminate the trace amount of the contaminantrs' to at or below PHG 'or MCLG if there is no
PHG) levels without regard to how minimal the risk might be. Cost estimates are theoretical
and include design, construction, and operational considerations for treatment facilities
using the Best Available Technology (BAT).
MWITKIFURKT, �1�
The USEPA and the California State Water Resources Control Board (SWRCB) Division of
Drinking Water (DDW) establish drinking water standards at very conservative levels to
protect consumers from potential health risks. MCLs are the regulatory definition of what is
11 safe". The MCL is the highest level of a contaminant allowed in drinking water. State MCLs
cannot be less stringent than federal MCLs and must be as close as is technically and
econoit to PHGs. MCLs are set at levels that take into consideration the cost of
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compliance based on available treatment technology for the contaminant. Adopted MCLs
?_Fermiffz"Gria utilized to ensure that a r.@,ublic water spstem is in comi-diance with drinkiRL
water standards. Per standard health effects language specified in California Drinking
Water Regulations, Title 22, Code of Regulations, drinking water which meets SWRCB DDW
standards is associated with little to no risk and should be considered safe.
PHGs set by OEHHA are based solely on public health risk considerations. PHGs and MCLGs
are set at very low levels where health risks are very low and in some cases zero. Health
risks determined at these low levels are frequently based on theoretical risk assessment
with many assumptions and mathematical extrapolations. Practical risk -management
factors such as analk!Alical detection caio. . i . . . . . , availabilio%p of treatment technolo�V_bgjjdjta_
capital costs, and ongoing operational costs which are considered by the USEPA and
SWRCB rW when setting enforceable drinking water standards such as MCLs, are not
considered when setting PHGs or MCLGs.
PHGs and MCLGs are not regulatory in nature and represent only non -enforceable
theoretical goals. A list of all regulated contaminants along with their MCLs and PHGs (or
MCLGs) is included as Attachment No. 1 to this Report.
Water Quality Data Considered
All the water quality data collected from the City's water system between calendar years
TIM
and 2018 Annual Water 59,ualit�kj Re -,torts 'Consumer Confidence R" -ort or
CCR) (Attachment Nos. 2-4), which were each made available to all water customers by
direct mail and/or posting on the City's website.
The 2019 PHG Report provides all information required in accordance with HSC Section
116470 for any constituents that were detected in the City's water supply at a level above
an applicable PHG or MCLG.
Such information included in this Report includes: the numerical public health risk
associated with the MCL and PHG (or MCLG) for the constituent in question, the category or
the annualized cost of a treatment system for the constituent if feasible.
Best Available Treatment Technology and Cost Estimates
Both the USEPA and the DDW adopt what are known as BATs or Best Available
levels to the MCL.
However, since many PHGs and MCLGs are set much lower than the MCLs, it is not always
-Urmine what treatment is needed to further reduce a constituent
CIIG gxg n.? . - .. je-tt. -tuvtv olIuAic� -re set A zero.
Q
Estimating the costs to reduce a constituent to a low PHG level (sometimes to non -detect
levels or zero) is difficult, if not impossible, and highly speculative because it is not always
possible to verify constituents at such low levels. Some constituents considered to be
carcinogenic have MCLGs designated as zero, which cannot be measured by practically
b•r Ni so-tte c,2ses. installing a treatme-a f,?.c"vv to furf"666""'
other aspects of a system's water quality, requiring additional treatment and additional
costs.
Where the best available technology that could be used to reduce the constituent level in
question exists, the annualized costs to design, install, and operate such treatment
equipment have been estimated. The annualized costs assume that they will be equally
shared by each of the approximately 23,500 service connections in the City's water system.
Iff M -TU -r-•
The following provides information on constituents that were detected in one or more of
the City's drinking water sources at a level above the PHIS, or the MCLG.
The table below is
a summary of those constituents, BATs, and numerical health risk.
Constituents Units MCL PHG or Detection Detection Numerical
Numerical BATS Aggregate
(MCLG)* Average
Range Cancer
Cancer
Cost Per
0.015 0.0002 0.0034
Risklat
Risk 'at
Year
on this
PHG or
MCL
(Million)
Total Coliform %
MCLG
0-15.2 NA
Positive
Arsenic mg/L 0.010 0.000004 0.00119 0-0.0035 Ix10'
2.5x10-' RO $6.3
Tetrachloroethylene
mg/L 0.005 0.00006 0.00025 0-0.0037 IxIO-'
8XI0-,
GAC $0.75
(PCE)
Gross -Alpha pCi/L 15 (0) 1.73 0-6.0 0
1x10 RO $15.4
Uranium pCi/L
20 0.43 w 2.1
0-3.8
f 1XI0,
<1XIO-,
(PHG is
Lead 2 Action Level mg/L
0.015 0.0002 0.0034
NA not based
on this
effect)
Total Coliform %
5% (0) 1.36
0-15.2 NA
Positive
H
5XI0RO $18.9
2xIO_' cc
NA D
*m[LG, are shown in parenthesis. xxcuss are
provided only when nuapplicable p*Gexists.
zcancer Risk= Upper estimate of excess cancer risk
per number of people exposed, resulting from
lifetime exposure. Actual cancer risk may be lower
orzero. Based unthe oc**Ap*stechnical support
document unless otherwise specified.
zAL= Action Levels for copper and lead refer to
concentration measured at the tap. Much of the
copper and lead in drinking water is derived from
household plumbing (rhe Lead and Copper Rule,
Title u2,California Code ofRegulations [ocn]Section
s4s7z.u).
GAc~GranularActivated Carbon
no~neveneosmusis
oC=c",mguncomro|
m=omnfection
|s~Ion Exchange
n[r=Reduction- Coagulation- Filtration
NA=Not Applicable
AL=xcdmnLeve|
mxT~sest Available Technology
mg/L=mU|iwomsper liter urparts per million
pcVL=picncune,per liter
mcL=Maximum Contaminant Level
Mcus=Maximum Contaminant Level Goal
P*G=pubUcHealth Goal
Arsenic has been detected from five water wells in the City water system. The MCL for
Arsenic is 0.010 milligrams per liter (mg/L) and the PHG is 0.000004 mg/L (4 parts per
trillion or ppt). As provided in the previous table the Arsenic levels detected in the City's
system were below the MCL but above the PHG level.
Arsenic is a naturally occurring element in the earth's crust and is widely distributed in
the environment. All humans are exposed to microgram quantities of arsenic largely
from food and to a lesser degree from drinking water and air. The PHG of 0.000004 mg/L
for arsenic in drinking water is derived based on the mortality of arsenic -induced lung
and urinary bladder cancers observed in the epidemiological studies. Similar unit risks
were derived from a mouse bioassay using prenatal exposure to arsenic. The risk
carcinogenic action is not fully understood.
The applicable BAT identified to treat arsenic is Reverse Osmosis (RO) treatment. Tht
City has determined that the cost to install and operate a RO removal system to treat the
subject wells in the water system to meet PHG levels would be up to $6.3 Million
annually, which includes construction and annual operational cost. This translates into
an annual cost of $267 per water service connection.
Tetrachlorethylene (PCE)
There are a total of three wells that have PCE levels below the MCL of 0.005 milligrams
per liter (mg/L) but above the PHG of 0.00006 mg/L. The PHG was derived based on
research showing incidences of cancer and leukemia in mice and rats exposed to PCE
over a lifetime. Constituents that cause cancer in laboratory animals also may increase
the risk of cancer in humans who are exposed over long periods of time. However,
61
according to standard health effects language specified in California Drinking Water
Regulations, Section 64468.2, Title 22, CCR, water which meets the drinking water
standard "the MCL is associated with little to no risk and should be considered safe with
respect to PCE.
A feasible BAT for removal of PCE is Granular Activated Carbon (GAC). The estimated
cost to install and operate such treatment systems on three wells would be up to $0.75
Million per year including annualized capital and operation and maintenance costs. This
would result in an assumed increased cost for each water service connection of $32 per
year.
Gross Alpha, Combined Radium, and Uranium.
Gross Alpha has been detected from 11 wells in the system. The MCL for gross alpha is
15 pico Curies per Liter (pCi/L) and the MCLG is 0 pCi/L. The levels detected in the City's
system were below the MCL, but were over MCLG levels set by USEPA. Uranium has been
detected from 13 wells in the system. The MCL for uranium is 20 pCi/L and the PHG is
0.43 pCi/L. The levels detected in the City's system were below the MCL at all times, bu'-1
were over the PHG level.
These radiological constituents are naturally occurring contaminants in water supplies.
These constituents have been shown to cause cancer in laboratory animals such as rats
and mice when the animals are exposed to high levels over their lifetimes. These
constituents that cause cancer in laboratorN animals also -M,% -A increase the risk of cancer
in humans who are exposed over long periods of time.
The BAT for the removal of gross alpha radioactivity in drinking water for large water
systems is reverse osmosis, which can also remove uranium. The City has estimated tha�
the cost to install and operate RO systems at the City's well sites to meet the PHG levels
would be up to approximately $22.2 Million annually, which includes construction and
annual operational costs. This translates into an annual cost of $945 per water service
co,uf ectio-c.
The SWRCB through the DDW enforces the Lead and Copper Rule, which follows the US
EPA's Lead and Copper Rule, and is used to protect the public's drinking water from
metals that can adversely affect public health. Lead and copper are not present in our
water sources, but they can leach into drinking water through the resident's plumbing
systems and faucets. The Lead and Copper Rule requires water systems to monitor lead
and copper levels at the consumers' taps.
There is no MCL for lead or copper. Instead of MCLs, every three years a set of special
samples are collected and the results evaluated to determine whether the City's water
system has achieved "optimized corrosion control. The 90th percentile value of all
samples collected from household taps in the distribution system cannot exceed an
Action Level of 0.015 mg/L for lead and 1.3 mg/L for copper. If Action Levels for lead or
copper are exceeded, installation or modifications to corrosion control treatment is
required. The PHG for lead is 0.0002 mg/L and the PHG for copper is 0.3 mg/L. The
categories of health risk associated with lead include damage to nervous system
(neurobehavioral effects in children) and kidneys, high blood pressure, and cancer.
for lead was 0.0034 mg/L and 0.26 mg/L for copper. The value for copper was lower
than the PHG, but the level of lead was higher than its corresponding PHG. However.
both lead and copper results were below the Action Levels, which means the City's
system continued to meet water quality standards and is in full compliance with the Lead
and Copper Rule. Therefore, the City system is considered by the DDW to have
11 optimized corrosion control." Optimizing corrosion control is considered to be the BAT
to deal with corrosion issues and any lead or copper findings. The City continues to
alkalinity, and total dissolved solids, and will take action if necessary to maintain the
system in an "optimized corrosion control" condition.
Since the City is meeting the "optimized corrosion control" requirements, it is not prudent
to initiate additional corrosion control treatment as it involves the addition of other
chemicals and there could be additional water quality issues created as a result of doing
so. Therefore, no estimate of cost has been included.
The MCL for coliform bacteria is 5% positive samples of the total system samples
collected per month and the MCLG is zero. The reason for the coliform drinking water
standard is to minimize the possibility of water containing pathogens which are
organisms that cause waterborne disease. Coliform is only a surrogate indicator of the
,votential presence of pathogens, therefore, it is not possible to quantify a specific
numerical health risk.
Coliform bacteria are an indicator organism that are ubiquitous in nature and are not
generally considered harmful. They are used because of the ease in monitoring and
analysis. If a positive sample is found, it indicates a potential problem that needs to be
investigated. It is not at all unusual for a system to have an occasional positive sample. It
is difficult, if not impossible to assure that a system will never detect a positive sample.
Per the California Total Coliform Rule and the Federal Revised Total Coliform Rule, the
the 3 year period from 2016 to 2018, monthly positive total coliform percentage results
had an average detection of 1.36% and ranged from 0% to 15.2%. All positive samples
were followed by corresponding actions including collecting confirmation samples,
investigating, and correcting the cause of positive samples. In response to positive
samples, precautionary flushing and/or chlorination was performed as considered
appropriate until samples determined that the water was total coliform free.
Although USEPA set the MCLG for total coliform at zero percent positive, there is nt
commercially available technology that will guarantee zero percent positive every single
month, therefore, the cost of achieving the PHG cannot be estimated.
The City has implemented and will continue to utilize proactive measures and BATs to
prevent any microbiological contamination. These include protection of wells by
appropriate construction and maintenance, proper preventative maintenance of the
distribution system by flushing, maintaining an effective cross -connection control
an effective sampling program that includes water quality monitoring of the distribution
system and City wells.
All contaminants
All contaminants listed in the attached table may be removed to non-detectable levels,
with the exception of lead and total coliform, which can be introduced anywhere in the
distribution system regardless of treatment. The cost estimate to treat the water
produced by the City to remove contaminants detected above the PHGs or MCLGs was
calculated using reverse osmosis for the removal of arsenic, gross alpha, and uranium,
and GAC treatment for the removal of PCE. Achieving the water quality goals could cost
up to $24,000,000 per year, or $1,021 per service connection per year.
The drinking water quality of the City of Downey's water system meets all State and
Federal drinking water standards set to protect public health. Additional costly
treatment processes would be required to further reduce the levels of the constituents
identified in this Report, which are already significantly below the MCLs established to
provide "safe drinking water". The effectiveness of the treatment processes to provide
significant reductions in constituent levels at these already low values is uncertain. The
health protection benefits of these further hypothetical reductions are not all clear and
may not be quantifiable. Therefore, no action is proposed.
�11
Attachments
IM111911-30011i .
3. Water Quality Report for 2017.
ATTACHMENT NO. 1
i 2016-2017-2018
MCLs, DI -Rs, and PHGs for Regulated Drinking Water Contaminants
(Units are in milligrams per liter (mg/L), unless otherwise noted.)
Last Update: December 26, 2018
This table includes:
California's maximum contaminant levels (MCLs)
Detection limits for purposes of reporting (DLRs)
Public h aIIV _ rsal _(PH s) from the Office of Environmental Health Hazard Assessment
(A)
Also, the PHG for NDMA (which is not yet regulated) is included at the bottom of this table.
Regulated Contaminant MCL I DLR PHG I Date of
PHG
Chemicals with MCLs in 22 CCR §64431—Inorganic Chemicals
Aluminum
1
0.05
0.6
Antimony
0.006
0.006
0.001
Arsenic
0.010
0.002
0.000004
Asbestos (MFL = million fibers per liter;
7 MFL
0.2 MFL
7 MFL
for fibers >10 microns long)
Barium
1
0.1
2
Beryllium
0.004
0.001
0.001
Cadmium - -- ----- --
0.005
0.001
0.00004
Chromium, Total - OEHHA withdrew the
005
0
withdrawn
0.0025-mg/L PHG
''01
Nov. 2001
Chromium, Hexavalent - 0.01-mg/L MCL
& 0.001-mg/L DLR repealed September
--
–
0.00002
2017
Cyanide
0.15
0.1
0.15
Fluoride
2
0.1
1
1 Mercury (inorganic)
!!!!
0.002
0.001
0.0012
Nickel
0.1
0.01
0.012
Nitrate (as nitrogen, N)
Nitrite (as N)
Nitrate + Nitrite (as N)
Perchlorate
Selenium
Thallium
10 as N 0.4
1 as N 0.4
10 as N --
------- ----- - - - - -- -
0.006 0.004
0.05 0.005
0.002 0.001
45 as
NO3 (=10
as N)
1 as N
An AI
v.vv 1
0.03
0.0001
2001
2016
---- ---- - -- -------
2004
2003
2003
2003
2006
im-Rl
2011
1997
1997
1999
(rev2005)*
2001
2018
2018
2018
2015
2010
1999
(rev2004)
Copper and Lead, 22 CCR §64672.3
Values referred to as MCLs for lead and copper are not actually MCLs; instead, they are
called "Action Levels" under the lead and copper rule
Copper 1 1.3 1 0.05 1 0.3 2008
Page 1 of 4
ATTACHMENT NO. 1
i 2016-2017-2018
( Lead 1 0.015 I 0.005 ( 0.0002 I 2009
Radionuclides with MCLS in 22 CCR §64441 and §64443 -Radioactivity
[units are picocuries per liter (pCi/L), unless otherwise stated; n/a = not applicable]
Gross alpha particle activity - OEHHA
concluded in 2003 that a PHG was not
15
3
none
n/a
practical
Gross beta particle activity - OEHHA
concluded in 2003 that a PHG was not
mr m/yr
4
none
n/a
practical
( Radium -226
--
1
0.05
2006
Radium -228
--
1
0.019
2006
Radium -226 + Radium -228
5
Strontium -90
8 (
2
0.35
2006
( Tritium
20,000
1,000
400
2006
Uranium
20 (
1
0.43
2001
Chemicals with MCLS in 22 CCR §64444 -Organic Chemicals
(a) Volatile Organic Chemicals (VOCs)
Benzene
1 0.001
0.0005
0.00015
2001
Carbon tetrachloride
0.0005
0.0005
0.0001
2000
p
11,2 -Dichlorobenzene
0.6
0.0005
0.6
1997
(rev2009)
1,4 -Dichlorobenzene (p -DCB)
0.005
0.0005
0.006
1997
1,1-Dichloroethane (1,1 -DCA)
0.005
0.0005
0.003
( 2003
1,2-Dichloroethane (1,2 -DCA)
0.0005
0.0005
0.0004
1999 i
(rev2005)
1,1-Dichloroethylene (1,1-DCE)
0.006
0.0005
0.01
1999
cis-1,2-Dichloroethylene
0.006
0.0005
0.013
2018
trans- 1,2-Dichloroethylene
0.01
0.0005
0.05
2018
Dichloromethane (Methylene chloride)
0.005
0.0005
0.004
2000
1,2-Dichloropropane
0.005
0.0005
0.0005
1999
1,3-Dichloropropene
0.0005I
0.0005
0.0002
1999
(rev2006)
Ethylbenzene
0.3
0.0005
0.3
1997
Methyl tertiary butyl ether (MTBE)
0.013
0.003
0.013
1999
Monochlor_obenzene
0.07
0.0005
0.07
2014
Styrene
( 0.1
0.0005
0.0005
2010
_
1,1,2,2 -Tetrachloroethane
0.001
0.0005
0.0001
2003_
Tetrachloroethylene (PCE)
0.005
0.0005
0.00006
( 2001
( Toluene
0.15
0.0005
0.15
1999
( 1,2,4-Trichlorobenzene
0.005
0.0005
0.005
1999
( 1,1,1 -Trichloroethane (1,1,1 -TCA)
0.2
0.0005
1
2006
1,1,2 -Trichloroethane (1,1,2 -TCA)
0.005
0.0005
0.0003
2006
Trichloroethylene (TCE)
0.005
0.0005
0.0017
2009
Trichlorofluoromethane (Freon 11)
0.15
0.005
1.3
2014
Page 2 of 4
ATTACHMENT NO.
Report:2019 PHG Triennial Calendar r r
1,1,2-Trichloro-1,2,2-Trifluoroethane
1.2
0.01
4
1997
(Freon 113)
(rev2011)
Vinyl chloride
0.0005
0.0005
0.00005
2000
Xylenes
1.75
0.0005
1.8
1997
(b) Non -Volatile Synthetic Organic Chemicals (SOCs)
Alachlor
0.002
0.001
0.004
1997
Atrazine
0.001
0.0005
0.00015
1999
Bentazon
0.018
0.002
0.2
1999
(rev2009)
Benzo(a)pyrene
0.0002
0.0001
0.000007
2010
Carbofuran
0.018
0.005
0.0007
2016
Chlordane
0.0001I
0.0001
0.00003
1997
(rev2006)
Dalapon
0.2I
0.01
0.79
1997
(rev2009)
1,2-Dibromo-3-chloropropane (DBCP)
0.0002
I 0.00001
0.0000017
1999
2,4-Dichlorophenoxyacetic acid (2,4-D)
0.07
0.01
0.02
2009
Di(2-ethylhexyl)adipate
0.4
0.005
0.2
2003
Di(2-ethylhexyl)phthalate (DEHP)
0.004
0.003
0.012
1997
Dinoseb
0.007
0.002
0.014
1997
(rev2010)
Diquat
0.02
0.004
0.006
2016
Endothal
1 0.1
0.045
0.094
2014
Endrin
0.002
0.0001
0.0003
2016
Ethylene dibromide (EDB)
0.00005
0.00002
0.00001
2003
Glyphosate
0.7
0.025
0.9
2007
Heptachlor
0.00001
0.00001
0.000008
1999
Heptachlor epoxide
0.00001
0.00001
0.000006
1999
Hexachlorobenzene
0.001
i 0.0005
0.00003
2003
Hexachlorocyclopentadiene
0.05
0.001
0.002
2014
Lindane
0.0002
0.0002
0.000032
1999
(rev2005)
Methoxychlor
0.03
0.01
0.00009
2010 j
Molinate
0.02
0.002
0.001
2008
Oxamyl
0.05
0.02
0.026
2009
Pentachlorophenol
0.001
0.0002
0.0003
2009
Picloram
0.5
0.001
0.166
2016
Polychlorinated biphenyls (PCBs)
0.0005
0.0005
0.00009
2007
Simazine
0.004
0.001
0.004
2001
Thiobencarb
0.07
0.001
0.042
2016
Toxaphene
0.003
0.001
0.00003
2003
1,2,3-Trichloropropane
0.000005
] 0.000005
0.0000007
2009
2,3,7,8-TCDD (dioxin)
3x10-6
5x10-9
5x10-"
2010
2,4,5 -TP (Silvex)
0.05
0.001
0.003
2014
Chemicals with MCLS in 22 CCR §64533 -Disinfection Byproducts
Total Trihalomethanes
0.080
1 --
I --
Bromodichloromethane
I --
1 0.0010
1 0.00006
2018 draft
Page 3 of 4
ATTACI-IFLEAT AO. 1
2019 PHG Triennial Report: Calendar Years 2016-2017-2018
Bromoform
0.0010
0.0005
2018 draft
Chloroform
0.0010
0. - 0004
2 - 018 draft -
Di brom ochlorom ethane
0.0010 0.0001
2018 draft
Haloacetic Acids (five)
) (H 5)
0.060 --
-
--
Monochloroace'tic Acid
0.0020
Dichloroacetic Adic
0.0010
Trichloroacetic Acid
0.0010
Monobromoacetic Acid
0.0010
Dibromoacetic Acid
0.-0-010 -- --
Bromate
0.010 0.0050** 0.0001
2009
Chlorite
1.0 0.020 0.05
2009
Chemicals with PHGs established in response to DD W requests. These are not
currently regulated drinking water contaminants.
N-Nitrosodimethylamine (NDMA)
I -- I -- 1 0.000003
2006
* OEHHA's review of this chemical during the year indicated (rev20XX) resulted in no
change in the PHG.
"The DLR for Bromate is 0.0010 mg/L for analysis performed using EPA Method 317.0
Revision 2.0, 321.8, or 326.0.
CityofDowney
This report is available for electronic viewing at httpj,/WWw.downevg[s,.Qfg/`w-qr/ZQ-Ifi.Rd—f PWS IN 1910034
If you would like a paper copy of the 2016 report mailed to your home, please call (562) 904-7202.
L
Visit us at www.downeyca.org
For additional questions about your water
quality please contact:
Bridgeth Tapia at (562) 904-7202
9252 Stewart & Gray Rd, Downey, CA 9024
You are welcome to attend the following public
meetings at City Hall, 11111 Brookshire Ave.
City Council Meetings on the second and fourth
Tuesday of each month at 6:30 p.m.
Public Works Committee meetings on the third
Thursday of each month at 4:00 p.m.
For Rebates & Conservation tips: bewaterwise.comO (888) 376-.3314 kr"hF : �- '' '
4r,
I VVatroe$rmart
To Report Water Waste USEPA Safe Drinking
For Information on Water
State Water Resources
City of Downey Water
(562) 904-7202 Water Hotline
Resources, Drinking Water
Control Board
Conservation &
(Public Works Utilities) (800) 426-4791
issues, and Public Health
http://www.waterboards.
Restrictions: http://
http://water.epa.gov/
www.epa.gov/watrhome
ca.gov/drinking–water/
www.downeyca.org/
drink/hotline
www.cdc.gov
(818) 551-2004
gov/pw/uti[ities/water
conservation.asp
In 2016, the City of Downey water system delivered more than 4.4
billion gallons of potable (i.e. drinking) water to approximately
112,800 residential, commercial, and industrial customers via 23,300
metered connections.
Recycled Water Use in Downey
In an effort to conserve water, the City utilizes recycled water to
offset potable water needs by as much as 5.4% of the City's overall
water demand through the application of recycled water for
landscaping irrigation, dual -plumbed buildings, takes, and ponds at
95 sites located throughout the City.
Trained water distribution system
The City's water supply and distribution system
operators, ® inspect, repair,
is operated by the City of Downey Department of
and replace these critical components
Public Works. Our water supply and distribution
of our drinking water infrastructure.
system is composed of 20 groundwater wells
located throughout the City and approximately
276 !;ff 5 00
276 miles of distribution pipeline with diameters
miles of Isolation
ranging from 4 to 24 inches. Our groundwater
potable Valves
wells provide one hundred percent of our
water main
domestic water supply. As a result, City of
Downey residents are able to enjoy one of the
least expensive water rates in Southern California
In 2016, the City of Downey water system delivered more than 4.4
billion gallons of potable (i.e. drinking) water to approximately
112,800 residential, commercial, and industrial customers via 23,300
metered connections.
Recycled Water Use in Downey
In an effort to conserve water, the City utilizes recycled water to
offset potable water needs by as much as 5.4% of the City's overall
water demand through the application of recycled water for
landscaping irrigation, dual -plumbed buildings, takes, and ponds at
95 sites located throughout the City.
Trained water distribution system
Your Water Supply
operators, ® inspect, repair,
Downey's groundwater is pumped from the Central Groundwater
Basin. The Central Basin is a series of large natural aquifers below
and replace these critical components
the ground that stretch from Los Angeles to Orange County.
of our drinking water infrastructure.
The Central Groundwater Basin receives natural inflows from
the conservation of rainfall and snow melt, artificial inflows from
imported and recycled water, as well as groundwater underflow from
276 !;ff 5 00
adjacent basins. As surface water slowly percolates through the
ground to the aquifers, the ground acts as a natural filter to clean the
miles of Isolation
water.
potable Valves
The City of Downey conveniently overlies the Central Basin.
water main
Groundwater from the Central Basin is pumped from 20 wells located
within the City's boundaries and provides the City with its principal
source of potable water.
Our Utilities Division conducts regular water quality monitoring to
23,300 niliSo
ensure that the water served meets USEPA and Sate Water Resource
Control Board (SWRCB) drinking water standards. We are committed
WMFire Hydrants
ater eters
to maintaining the reliability of our water system and the quality of the
water delivered to you.
How Can I Save Water?
The City of Downey encourages everyone to look closely at their water usage habits and for ways to use less water.
Water conservation efforts help maintain low water rates for our residents and supports the long-term sustainability
of our water supply.
Find Fix Leaks i
Your Home
Locate your water meter and check the leak
indicator. Make sure no water is being used inside or
outside your home at the moment. Check to see if
the leak indicator is moving or spinning. A moving
leak indicator shows that water is either being used
orwasted. Leaks should be repaired within 48 hours.
Low Flow Fixtures
Installing low -flow faucet aerators
that use a maximum of 1.5 gallons per
minute can reduce a sink's water used
by 30 %or more. Remember to clean
or replace aerator screen and parts
to remove hard water build up from
faucets and showerheads.
Drought tolerant landscaping can save
you 40-60 gallons of water annually for
every square foot of traditional grass
lawn replaced.
Who do I call if e
es not have a private
shut-off valve?
City water meter valves are to be operated by city
personnel only. Please call 562-904-7202 weekdays
between the hours of 7:00 am -4:00 pm should you
need the city valve shut-off for a repair.
• - •
Fix broken sprinklers, make sure there is
no runoff, and periodically check settings.
Limit watering to a maximum of minutes
per sprinkler station. If you do not have
sprinklers, a spray nozzle with positive
shutoff nozzle is allowed.
FALL/ INTER: October 1 -April 30
No more than 2 days per week
SPRING/SUMMER: May 1- September 30
No more than 3 days per week
ODD Numbered Addresses: (Ending in 1, 3, 5, 7, 9)
Mondays, Wednesdays and/or Fridays
EVEN Numbered Addresses: (Ending in 0, 2, , 6, )
Tuesday, Thursday, and/or Saturdays
Downey's drinking water comes from local, deep ground-
water
Prevent Pollution
Polluted runoff flows to storm drains directly into our rivers, bays, beaches, and the
ocean. All of which pollute our beaches and harm fish and wildlife. As a community
it is important to prevent chemicals, automobile fluid, and trash from entering our
storm drains.
Source WaterAssessent
An assessment of the City's drinking water sources was completed in 2003 by the State
Department of Drinking Water. The sources are considered most vulnerable to the
following activities: automobile gas stations, dry cleaners, injection wells, dry wells,
sumps, metal plating, finishing, fabricating, fleet truck, bus terminals, furniture repair,
manufacturing, machine shops, and National Pollutant Discharge Elimination System
(NPDES)/Waste Discharge Requirement permitted discharges.
A copy of the complete assessment is available by contacting the SWRCB, DDW at
(818) 551-2004 or by calling the City of Downey Utilities Division at (562) 904-7202.
GLOSSARY OF TERMS AND ABBREVIATIONS
Maximum Contaminant Level (MCL): The
highest level of a contaminant that is allowed
in drinking water. Primary MCLs are set as close
to the PHGs (or MCLGs) as is economically
and technologically feasible. Secondary MCLs
(SMCLs) are set to protect odor, taste, and
appearance of drinking water.
Maximum Contaminant Level Goal (CLG):
The level of a contaminant in drinking water
below which there is no known or expected risk
to health. MCLGs are set by the U.S. EPA.
Detection Limits for Purposes of Reporting
(DLR): The DLR is a parameter that is set by
regulation by each reportable analyte. It is not
laboratory specific and it is independent of the
analytical method used (in cases where several
methods are approved). It is expected that a
laboratory can achieve a Reporting Limit that is
lower than or equal to the DLR set by the State.
This is also known as the Minimum Reporting
Level (MRL).
Primary Drinking Water Standard (PDS):
MCLs and MRDLs for contaminants that
affect health along with their monitoring and
reporting requirements, and water treatment
requirements.
Public Health Goal (PHG): The level of a
contaminant in drinking water below which
there is no known or expected risk to health.
PHGs are set by the California Environmental
Protection Agency.
Regulatory Action Level: (AL): The
concentration of a contaminant which, if exceeded,
triggers treatment or other requirements that a
water system must follow.
NA: Contaminant or property was not analyzed.
ND: Contaminant was not detected. The
contaminant is less than the DLR.
n/a: Not applicable
Units of Measurement:
ppm= parts per million
ppb= parts per billion
pCi/L = picocuries per liter
µS/cm=microsiemens per centimeter
%= percent
Parts per million (ppm) is 3
drops in 42 gallons (an average
sized bathtub)
Parts per billion (ppb) is 1 drop
in 14,000 gallons (an average
sized swimming pool)
C rry or vownn
WATER serrvt E RCA
' 0
05 a @Ades
Prevent Pollution
Polluted runoff flows to storm drains directly into our rivers, bays, beaches, and the
ocean. All of which pollute our beaches and harm fish and wildlife. As a community
it is important to prevent chemicals, automobile fluid, and trash from entering our
storm drains.
Source WaterAssessent
An assessment of the City's drinking water sources was completed in 2003 by the State
Department of Drinking Water. The sources are considered most vulnerable to the
following activities: automobile gas stations, dry cleaners, injection wells, dry wells,
sumps, metal plating, finishing, fabricating, fleet truck, bus terminals, furniture repair,
manufacturing, machine shops, and National Pollutant Discharge Elimination System
(NPDES)/Waste Discharge Requirement permitted discharges.
A copy of the complete assessment is available by contacting the SWRCB, DDW at
(818) 551-2004 or by calling the City of Downey Utilities Division at (562) 904-7202.
GLOSSARY OF TERMS AND ABBREVIATIONS
Maximum Contaminant Level (MCL): The
highest level of a contaminant that is allowed
in drinking water. Primary MCLs are set as close
to the PHGs (or MCLGs) as is economically
and technologically feasible. Secondary MCLs
(SMCLs) are set to protect odor, taste, and
appearance of drinking water.
Maximum Contaminant Level Goal (CLG):
The level of a contaminant in drinking water
below which there is no known or expected risk
to health. MCLGs are set by the U.S. EPA.
Detection Limits for Purposes of Reporting
(DLR): The DLR is a parameter that is set by
regulation by each reportable analyte. It is not
laboratory specific and it is independent of the
analytical method used (in cases where several
methods are approved). It is expected that a
laboratory can achieve a Reporting Limit that is
lower than or equal to the DLR set by the State.
This is also known as the Minimum Reporting
Level (MRL).
Primary Drinking Water Standard (PDS):
MCLs and MRDLs for contaminants that
affect health along with their monitoring and
reporting requirements, and water treatment
requirements.
Public Health Goal (PHG): The level of a
contaminant in drinking water below which
there is no known or expected risk to health.
PHGs are set by the California Environmental
Protection Agency.
Regulatory Action Level: (AL): The
concentration of a contaminant which, if exceeded,
triggers treatment or other requirements that a
water system must follow.
NA: Contaminant or property was not analyzed.
ND: Contaminant was not detected. The
contaminant is less than the DLR.
n/a: Not applicable
Units of Measurement:
ppm= parts per million
ppb= parts per billion
pCi/L = picocuries per liter
µS/cm=microsiemens per centimeter
%= percent
Parts per million (ppm) is 3
drops in 42 gallons (an average
sized bathtub)
Parts per billion (ppb) is 1 drop
in 14,000 gallons (an average
sized swimming pool)
WATER QUALITY SAMPLE TESTING RESULTS
During the past year over 100 regulated contaminants were tested for in order to determine the presence of any biological, inorganic, volatile organic or
synthetic organic, and radioactive contaminants. The following tables include only those contaminants that were detected in the water. Both federal
and state regulations require us to monitor for certain substances less than once per year because the concentrations of these substances do not change
frequently. In these cases, the most recent sample data are included.
PRIMARY STANDARDS (monitored for Health concerns)
Range '�l.lat�.n! iypic.t Source of Contaminant
MCLG
MC--T-
Substance(Unit) L PHG/ I Average
(Low -High)
Microbiological
Total Coliform Bacteria (%)
IsLite Total Coliform Rutey
Radfologicals
Gross Alpha Particle Activity
(pC!/L)
Uranium ipCaILJ
Volatile Organic Compounds
Tetrachloroethylene (PCE)
Trichloroothylprie (TCE) 4)pb)
cis -1,2- Dichloro-ethylene
(ppb)
Inorganic Compounds
5 1 (0) 4 0.08 1 0-1.0 NO � Naturally present in the environment
15 (0)
20 0.43
5 0.06
5 1.7
1 100
NO ND -3.2 NO Erosion of natural deposits
3.0 1.9-3.7 NO Erosion of natural deposits
ND ND - 3.7 NO Discharge from factories, dry cleaners, and auto shops (metal degreaser)
IND : ND -1.4 NO Discharge from metal degreasingsites and other factories
ND NO --0.7- NO Discharge from industrial chemical factories; major biodegradation byproduct of & PCE groundwater
contamination.
Arsenic (ppb)
10
0.004
ND f
ND - 2.4
NO
Erosion of natural deposits; runoff from orchards; glass and electronics production wastes
Barium ;putt,)
1
2
IND
ND - 0.12
NO
Discharge of oil drilling wastes and from metal refineries; erosion of natural deposits
Fluorid e ppm)
2
1
0.33
0.2-0.4
NO
Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and
0.7
Chloride (ppm)
Soo
68
39-91
No i Runoff and leaching from natural deposits
aluminum factories
Nitrate as IN tpprn)
10
10
2.1
0.7-3.1
NO
Runoffand leaching from fertitizera use; eachingfrom septic tanks and sewage; erosion of natural deposits
Hexavalent Chromium (ppb)
10
0.02
No
ND -1.1
NO
Discharge from electroplating factories, leather tanneries, wood preservation, chemical synthesis, refactory
Total Dissolved Solids,pprn
1000
473
280-660
NO Runoff/leaching from natural deposits
WATER CHARACTERISTICS
production, and textile manufimuint, faciIifiv,,, erosion of natural deposits
TAP WATER SAMPLES were collected for lead and copper
analyses from sample sites throughout the community
Substance (Unit)
Action
PHGSites
Violation Typical Source
Violation
Typical Source
(Low -High) 1:
Level
Alkalinity(pp
Percentile
Above AL/
100 - 23D
F- NO Naturally occurring soluble mineral.
Calcium (pprii)
(AL)
74
41-110
Total Sites
Magnesium(ppm)
n/a
Lead (ppb)
15
0.2
4.1 1
0 out of 50
NO
Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of
natural deposits
Copper (ppm)
1.3 0.3
0.2
0 out of 50 I
NO internal corrosion of household water plumbing systems; erosion of natural deposits; leaching from wood
1, 4 Dioxane (ppb)
n/a
n/a
preservatives
SECONDARY STANDARDS (Monitored for aesthetic qualities)
-
Substance (Unit)
SMCL
Average
Range-
Violation JT;ical'Source
NA
Chromium, Total (ppb)
50
(Low -High)
0.7
Chloride (ppm)
Soo
68
39-91
No i Runoff and leaching from natural deposits
Copper (Ppm)
I
ND
NO - 0.2
NO Erosion of natural deposits; teaching from wood preservatives.
Specific Conductance (pS/cm)
1600
738
480-920
NO i Substances that form ions when in water; seawater influence
Sulfate (ppm)
500
107
69-150
NO Runoff/leaching from natural deposits; industrial wastes
Total Dissolved Solids,pprn
1000
473
280-660
NO Runoff/leaching from natural deposits
WATER CHARACTERISTICS
(No MCL or MRDL
but state or federal monitoring required)
Substance (Unit)
SMCL
Average
Range k
Violation Typical Source
(Low -High) 1:
Alkalinity(pp
n/a
165
100 - 23D
F- NO Naturally occurring soluble mineral.
Calcium (pprii)
n/a
74
41-110
NO Abundant naturally occurring element
Magnesium(ppm)
n/a
16
8.5-23
NO -Abundant naturally occurring element
pri (units)
6.5-8.5
7.6
7.4-7.9
NO Hydrogen ion concentration
Potassium (ppm)
n/a I
4
3.1-4.6
No Runoff or leaching from natural deposits
Sodium Jppmi
n/a
54
37-70
NO Erosion of natural deposits
Total Hardness (grains per
n/a
15
8.2-22
NO I "Hardness" is the sum of polyvalent cations present in the water, generally magnesium and calcium. The
cations are usually naturally occurring.
FEDERAL UNREGULATED CONTAMINANTS Monitoring Rule UCMR 3 Data
(Unregulated contaminant monitoring helps USEPA and the State Water Resources Control Board to
determine where certain contaminants occur and whether the contaminants need to be regulated)
Substance (Unit)
SMCL � PHG/
Average
Range
I Violation Typical Source of Contaminant
Used in many products including paint strippers, dyes, greases, varnishes, and waxes; also found as an
impurity antifreeze and aircraft deicing fluids and in some consumer products (deodorants, shampoos,
and
Agricultural defoliant or desiccant; disinfection byproduct; and used in production of chlorine dioxide.
Discharge from steel and pulp mills and chrome planting; Erosion of natural deposits.
Naturally present in the environment
Surfactant or emulsifier; used in fire -fighting foam, circuit board etching acids, alkaline cleaners, floor
polish, and as a pesticide active ingredient for insect bait traps.
JNaturally present in the environment
Naturally present in the environment
L-MCL/Al7-
-(Low-High) I
1, 4 Dioxane (ppb)
n/a
n/a
175
0.54-2.8
NA
.Chlorate t I ppbl
n/a
n/a
21.3
ND -54
NA
Chromium, Total (ppb)
50
100
0.7
0.43-1.2
NO
Molyhdi-num qkpbp
n/a
n/a
1.92
ND - 2.4
NA
Perfluoro-1-octanesulfonate
n/a
n/a
0.01
ND -0.05
NA
(PFOS) (ppb)
Strontium 'I)pbt
n/a
n/a
524
410-620
INA
Vanadium (ppb)
n/a
n/a
2.65
23-3.4
NA
Used in many products including paint strippers, dyes, greases, varnishes, and waxes; also found as an
impurity antifreeze and aircraft deicing fluids and in some consumer products (deodorants, shampoos,
and
Agricultural defoliant or desiccant; disinfection byproduct; and used in production of chlorine dioxide.
Discharge from steel and pulp mills and chrome planting; Erosion of natural deposits.
Naturally present in the environment
Surfactant or emulsifier; used in fire -fighting foam, circuit board etching acids, alkaline cleaners, floor
polish, and as a pesticide active ingredient for insect bait traps.
JNaturally present in the environment
Naturally present in the environment
Lead can cause serious health problems if present at elevated levels,
especially for pregnant women and young children. Lead in drinking
water is primarily from materials and components associated with
service lines and home plumbing. Lead can be released when your tap
water comes in contact with pipes and plumbing fixtures containing lead.
The City of Downey is responsible for providing high quality drinking
water, but cannot control the variety of materials used in plumbing
components. When your water has been sitting for several hours, you
can minimize the potential for lead exposure by flushing your tap for 30
seconds to 2 minutes before using water for drinking or cooking. If you
do so, you may wish to collect the flushed water and reuse it for another
beneficial purpose, such as watering plants. If you are concerned about
lead in your water, you may wish to have your water tested. Information
on lead in drinking water, testing methods, and steps you can take to
minimize exposure is available from the Safe Drinking Water Hotline (800-
426-4791)orathfkr:r''I�Jbrw.dyil,,�poar;s�fw «ate,r!&aFael
.�• �• �Ll
Some people may be more vulnerable to contaminants in drinking
water than the general population. Immuno -compromised persons
such as persons with cancer undergoing chemotherapy, persons who
have undergone organ transplants, people with HBV/AIDS or other
immune system disorders, some elderly, and infants can be particularly
at risk from infections. These people should seek advice about drinking
water from their health care providers. The Environmental Protection
Agency (EPA) and the Centers for Disease Control and Prevention (CDC)
guidelines on appropriate means to lessen the risk of infection by
Cryptosporidium and other microbial contaminants are available from
the Safe Drinking Water Hotline (800-426-4791).
Substances That Could Be in Water
Sources of drinking water (both tap waterand bottled water) include
groundwater wells, springs, rivers, lakes, streams, ponds, and reservoirs. As
water travels over the surface of the land or through the ground, it dissolves
naturally occurring minerals and, in some cases, radioactive material, and
can pick up substances resulting from the presence of animals or from
human activity.
Federal and State Water Quality Regulations
In order to ensure that tap water is safe to drink, the U.S. Environmental
Protection Agency (USEPA) and the State Water Resources Control Board
(State Board) prescribe regulations that limit the amount of certain
contaminants in water provided by public watersystems.
U.S. Food and Drug Administration regulations and California law also
establish limits for contaminants in bottled waterthat provide the same
protection for public health. Additional
information on bottled water is available on the
California Department of Public Health website
(http://www.cdph.ca.gov/programs/Pages/
fdbBVW.aspx).
Drinking water, including bottled water, may
reasonably be expected to contain at least small
amounts of some contaminants. The presence of
contaminants does not necessarily indicate that
water poses a health risk. More information about
contaminants and potential health effects can
be obtained by calling the USEPA's Safe Drinking
Water Hotline (800) 426-4791.
Here are some ways you can create a cross -connection at home.
Protect your home from cross connections by avoiding the following:
Protect your home with air vacuum breakers. Over half of the
Nation's cross -connections involve unprotected garden hoses.
Check to see if you have aiirvacuum breakers installed on
each of your hose bibs. They prevent water from getting back
into the drinking water system. These sample devices are
inexpensive and can be purchased from your local hardware
store. They are easy to install, you just simply screw them
onto the hose bib.
Avoid putting the garden
Avoid connecting your
Avoid putting the
hose into swimming
garden hose to a plant
garden hose down the
pools or buckets to fill.
fertilizer or bug spray
drain to flush debris
Water can flow back into
unit. This can cause
when it's backed
the hose and into your
harmful chemicals to
up. This can cause a
home.
flow back into your
serious health hazard.
home.
Contaminated water
can be drawn back
into your home's water
supply.
. . .....................
1H
a]
OV
k,
w.
1.15 11
The City's water supply and distribution system is operated by the City of Downey Department of Public Works. Our
water supply and distribution system is composed of 20 groundwater wells located throughout the City and
approximately 276 miles of distribution pipeline with diameters ranging from 4 to 24 inches. Our groundwater wells
provide one hundred percent of our domestic water supply. As a result, City of Downey residents are able to enjoy one
of the least expensive water rates in Southern California.
In 2017, the City of Downey water system delivered more than 4.7 billion gallons of potable (i.e. drinking) water to
approximately 112,500 residential, commercial, and industrial customers via 23,500 metered connections. In an effort
to conserve water, the City utilizes recycled water to offset potable water needs by as much as 5.1%® of the City's overall
water demand through the application of recycled water for landscaping irrigation, dual -plumbed buildings, lakes, and
ponds at 96 sites located throughout the City. Trained water distribution system operators, operate, inspect, repair, and
replace these critical components of our drinking water infrastructure.
Committed
We are once again proud to present our annual water quality report covering all testing performed between January 1
and December 31, 2017. Over the years, we have dedicated ourselves to producing drinking water that meets all State
and Federal standards. As new challenges to drinking water quality emerge, we remain vigilant in meeting the goals of
source water protection, water conservation, and community education while continuing to serve the needs of all our
water users. This report summarizes information regarding water sources used, any detected contaminants, compliance,
and educational information.
During 2017, as in years past, your tap water met all U.S. Environmental Protection Agency (U.S. EPA) and the State
Water Resources Control Board (State Water Board) health standards. There were no violations of a contaminant level
or of any other water quality standard during 2017. We are always available to assist you with any questions or concerns
you may have about your water by calling us at (562) 904-7202.
}
An assessment of the City's drinking water sources was completed in 2003 by the State Department of Drinking Water.
The sources are considered most vulnerable to the following activities: automobile gas stations, dry cleaners, injection
wells, dry wells, sumps, metal plating, finishing, fabricating, fleet truck, bus terminals, furniture repair, manufacturing,
machine shops, and National Pollutant Discharge Elimination System (PDES)/Waste Discharge Requirement permitted
discharges. A copy of the complete assessment is available by contacting the S C -DD at (818) 551-2004 or by
calling the City of Downey Utilities Division at (562) 904-7202.
Contaminants 7hat May .:
esent in Source Water Include
Aficrobial contaminants, such as viruses and bacteria, that may come from sewage treatment plants, septic systems,
agricultural livestock operations, and wildlife.
Inorganic contaminants, such as salts and metals, that can be naturally -occurring or result from urban stormwater
runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming.
Pesticides er icl , that may come from a variety of sources such as agriculture, urban stormwater runoff, and
residential uses.
Organic chemical contaminants, including synthetic and volatile organic chemicals, that are byproducts of industrial
processes and petroleum production, and can also come from gas stations, urban stormwater runoff, agricultural
application, and septic systems.
Radioactive contaminants, that can be naturally -occurring or be the result of oil and gas production and mining activities.
Lea�dr,AW, 00
7 pper
Lead can cats erious health problems if present at elevated levels, especially for pregnant women and young children.
•%watcr is primarily from materials and components associated with service lines and home plumbing.
ed wlien your tap water comes in contact with pipes and plumbing fixtures containing lead. The City
orisible for•roviding high ualit drinking water but cannot control the variet of materials used in
bnportant Health Infbimation
Some people :40 be more vulnerable to contaminants in drinking water than the general population.
16-compromj` persons such as persons with cancer undergoing chemotherapy, persons who have undergone
organ ransplants, pie with HIV/AIDS or other immune system disorders, some elderly, and infants can be
particularly at risk )m infections. These people should seek advice about drinking water from their health care
providek U.S. EP enters for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection
by Crypuost)6ridu�`m and other microbial contaminants are available from the Safe Drinking Water Hotline at
(1-800-426-4791)
M
It dons
itodstwe'"O" ".jeuk
p
qJ4 _r, ia typter js�� sa e to drink, the 0.$.�EPA and the State Water Board prescribe regulations that
V
z n'
a hami #1 water provi by public water systems. The St t
Oqui Qf�'-ert4 W,�,cbn n(s, 6 � Water Board regulations
dej
'11"I ts Or"CO
n4minAvts Ottled water that provide the same protection for public health.
kIr
cluding I te
t: � led r reasonably be:vXpected to contain at least some contaminants. The
ay
m does� 1� iii4icate, that ivater es ooobo
a health risk. Mre infrmatin aut
,presetice 0 con III posI
Ice
contaminants and potential health effects can be obtained by calling U.S. EPA's Safe Drinking Water Hotline at
(1-800-426-4, 91)The ood and Drug Administration regulations and California law also establish limits for
contaminants in bottled water that provide the same protection for public health.
Additional information regarding bottled water is available on the California Department of Public Health website
https://www.cdph.ca.gov/Programs/CEH/DFDCS/Pages/FDBPrograms/FoodSafetyProgram[Water.aspx
Substances that Could.& in Water
The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs,
springs, and groundwater wells. As water travels over the surface of the land or through the ground, it dissolves
naturally -occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the
presence of animals or from human activity.
Water Conservationnps
As California continues to deal with the effects of t d ght, the City of Downey encourages everyone to look
ss
closely at their water usage habits and for ways tol(tj water and help meet the State's latest conservation
requirements.
A "S
Use Drought Tolerant Landscaping
For every square foot of grass lawn replaced with attractive drought tolerant landscA"1 40-60 gallons of water can
be saved annually.
0
Mulch Around your Find and Fix Leaks
Pl 1 Locate your water meter and check
f
Mulch helps retain maximum the leak indicator. Make sure no
moisture. Mulch reduces water water is being used inside or outside
ohme at this time. If the leak
lost to evaporation. Up to 80% yur o
indicator is spinning, this means you
of rainwater will evaporate
may have found a leak. Leaks should
where no mulch is used.
be repaired within 48 hours.
'"at IS71
ce-
ODD Numbered Addresses: (Ending in 1, 3, 5, 7,9)
Mondays, Wednesdays and/or Fridays
EVEN Numbered Addresses: (Ending in 0, 2, 4, 6, 8)
Tuesday, Thursday, and/or Saturdays
Z
H
13
By installing low -flow aerators
that utilize a maximum of 1.5
gallons per minute you can
help reduce a sink's water used
by 30% or more from the
standard flow of 2.2 gallons per
minute.
of Dowsrev 201+�
PHG
Range
Substance (Unit)
Average
Violation
Typical Source of Contaminant
(MCL
SMCL)
(C )
(Low h}
Microbiological
Total Coliform Bacteria (%)
Highest Monthly
Water System
(State Total Coliform Rule)
5
(0)
Average= (2.2%)
Range = (0 - 2.2)
NO
Naturally present in the environment
Radlologkals
Gross Alpha Particle Activity (pCi/L)
15
(0)
NO
NO -454
NO
Erosion of natural deposits
Uranium (pCi/L)
20
0.43
2.1
NO - 3.8
NO
Erosion of natural deposits
Volatile Organic Compounds
Tetrachloroethylene (PCE) (ppb)
5
0.06
NO
ND -30
NO
Discharge from factories, dry cleaners, and auto shops (metal degreaser)
Trichloroethylene (TCE) (ppb)
5
1.7
NO
NO - 1.0
NO
Discharge from metal degreasing sites and other factories
Discharge from industrial chemical factories; major biodegradation byproduct of
' cis -1,2- Dichlorcethylene (ppb)
6
100
NO
NO -0.3
NO
TCE & PCE groundwater contamination
Inorganic Compounds
Erosion of natural deposits; runoff from orchards; glass and electronics production �
Arsenic (ppb)
10
0.004
ND
NO - 3,5
NO
wastes
Discharge of oil drilling wastes and from metal refineries; erosion of natural
Barium (ppm)
1
2
NO
ND -0,12
NO
deposits
Fluoride (ppm)
2
1
0.35
0.25-0.43
NO
Erosion of natural deposits; water additive which promotes strong teeth;
discharge from fertilizer and aluminum factories
Runoff and leaching from fertilizer use; leaching from septic tanks and sewage;
Nitrate as Nm
N(ppm) )
10
10
2.2
ND - 3.7
NO
erosion of natural deposits
Secondary Standards (Monitored for aesthetic qualities)
Chloride (ppm)
(500)
n/a
68
31-91
NO
Runoff and leaching from natural deposits
Copper (ppm)
(1)
0.3
NO
NO -0.2
NO
Erosion of natural deposits; leaching from wood preservatives
Iron (ppb)
(300)
n/a
NO
ND -260
NO
Leaching from natural deposits; industrial wastes
Specific Conductance (pS/cm)
(1600)
n/a
739
290-920
NO
Substances that form ions when in water; seawater influence
Sulfate (ppm)
(500)
n/a
105
33-150
NO
Runoff/leaching from natural deposits; industrial wastes
Total Dissolved Solids (ppm)
(1000)
n/a
480
220-660
NO
Runoff/leaching from natural deposits
Water Characteristics (No MCL or MRDL but state or federal monitoring
i
required)
N
Alkalinity (ppm)
i
n/a
n/a
163
49-230
NO
Naturally occurring soluble mineral o
Calcium (ppm)
n/a
n/a
74
15-120
NO
Abundant naturally occurring element
Magnesium (ppm)
n/a
n/a
15
3.3-23
NO
Abundant naturally occurring element
pH (units)
(6.5 - 8 5)
n/a
7.5
7.2-8.1
NO
Hydrogen ion concentration
Potassium (ppm)
n/a
n/a
4
2.8-6.1
NO
Runoff or leaching from natural deposits
Sodium (ppm)
n/a
n/a
56
37-79
NO
Erosion of natural deposits
"Hardness" is the sum of polyvalent cations present in the water, generally
Total Hardness (grains per gallon)
n/a
n/a
14.4
30-22.8
NO
magnesium and calcium. The cations are usually naturally occurring
State Unregulated Contaminants with
No MCL
Discharge from electroplating factories, leather tanneries, wood preservation,
Hexavalent Chromium (ppb)
n/a
0.02
NO
NO -1.1
NO
chemical synthesis, refractory production, and textile manufacturing facilities;
erosion of natural deposits
(Unregulated contaminant monitoring helps USEPA and the State Water Resources Control Board to determine
Federal Unregulated Contaminants Rule
UCR3 Data
where certain contaminants occur
and whether the contaminants need to be regulated)
'
Used in many products including paint strippers, dyes, greases, varnishes, and
1, 4 Dioxane (ppb)
n/a
n/a
1.75
0,54 - 2 8
NA
waxes; also found as an impurity antifreeze and aircraft deicing fluids and in some !
consumer products (deodorants, shampoos, and cosmetics)
Agricultural defoliant or desiccant; disinfection byproduct; and used in production
Chlorate (ppb)
n/a
n/a
21.3
ND -54
NA
of chlorine dioxide
Discharge from steel and pulp mills and chrome planting; Erosion of natural
Chromium, Total (ppb)
50
(100)
0,7
0.43-1.2
NO
deposits
Molybdenum (ppb)
n/a
n/a
1.92
NO - 2.4
NA
Naturally present in the environment
Surfactant or emulsifier; used in fire -fighting foam, circuit board etching acids,
Perfluoro-l-octanesulfonate (PFOB)
n/a
n/a
001
NO - 0.05
NA
'
alkaline cleaners, floor polish, and as a pesticide active ingredient for insect bait
(ppb)
traps
Strontium (ppb)
n/a
n/a
524
410-620
NA
Naturally present in the environment
Vanadium (ppb)
n/a
n/a
2.65
2.3-3.4
NA
Naturally present in the environment
Tap tnftraIr19b mere c1#teCed ( Iced rl'opt*r ffiraale skt thghoul.#h n1rlil
Substance (Unit)
a ion
PHG
90th Percentile
Above
Violation
Typical Source
Le
Internal corrosion of household water plumbing systems; discharges from
Lead (ppb)
15
0.2
3.4
0 out of 52
NO
industrial manufacturers; erosion of natural deposits
Internal corrosion of household water plumbing systems; erosion of natural
Copper (ppm)
1.3
0.3
0.26
0 out of 52
NO
deposits; leaching from wood preservatives
i"lulnl l fit€ cit"t th It re ttl ited lead sats( ll,
A total of 22 schools submitted requests to be sampled for lead during 2017. Up to 5 samples were collected at each school.
Maximum Contaminant Level ): The highest level of a
contaminant that is allowed in drinking water. Primary MCLS are set as
close to the PHGs (or MCLGs) as is economically and technologically
feasible. Secondary MCLs (SMCLs) are set to protect odor, taste, and
appearance of drinking water.
Maximum Contaminant Level Goal ): The level of a
contaminant in drinking water below which there is no known or
expected risk to health. MCLGs are set by the U.S. EPA.
Detection Limits for Purposes of Repo (DLR): The DLR is a
parameter that is set by regulation by each reportable analyte. It is not
laboratory specific and it is independent of the analytical method used
(in cases where several methods are approved). It is expected that a
laboratory can achieve a Reporting Limit that is lower than or equal to
the DLR set by the State. This is also known as the Minimum Report-
ing Level (MRL).
Primary g Water S (PDWS): MCLs and MRDLs for
contaminants that affect health along with their monitoring and
reporting requirements, and water treatment requirements.
Public Health Goal (): The level of a contaminant in drinking
water below which there is no known or expected risk to health. PHGs
are set by the California Environmental Protection Agency.
Regulatoxy Actionvel (AL): The concentration of a contaminant
which, if exceeded, triggers treatment or other requirements that a
water system must follow.
Units of Measurement:
ppm= parts per million
ppb= parts per billion
pCi/L = picocuries per liter
kS/cm=micro Siemens per centimeter
% = percent
: Contaminant or property was not analyzed.
: Contaminant was not detected. The contaminant is less than the
DLR.
n/a: Not applicable
availableQuestions About Your Water? We v -e yf
For Rebates & Conservation tips: You axe welcome to attend e following
e�: ,,i� isexo (888) 376-3314
public meetings at City Hall,
(01 Water' Stuart 11111 Brookshire Ave.
To Report
' 1 i
r 904-7202
USEPA Safe Drinking Water Hotline
(800) 4264791
For i ..: on on Water
and Public Health
www.epa-gov/watrhome
State Water Resources Control Board
.: 11•
City of Downey
Conservation Restrictions:
Public
of .,
Visit us at www.downeyc&org
For Additional questions about your water quality
please contact:
Bri geth "Tapia at (562) 994-7202
9252 Stewart & Gray Rd,
Downey, CA 90241
Este informe contiene informaci6n muy
importante sobre su agua potable. Tradiizcalo
o liable con a1guien que to entienda bien.
Mahalaga ang impormasyong ito.
Prevent Pollution
Cityof"Downey
Polluted runoff flows to storm drains directly
01 UtLA-t—= 00* 9--aVL-Ir*-
into our rivers, bays, beaches, and the ocean.
9 ILI it �—H 14 110-1 A A 1 —9 -If �j Al -2
Contaminated runoff can pollute our beaches,
This report contains important information F
and also harm fish and wildlife. As a community
about your drinking water. Translate it, or
it is important to prevent chemicals, automobile
I
speak with someone who understands it.ry
This report is available for electronic viewing at
fluid, and trash from entering our storm drains.
Pl-p qYi �v(
Este informe contiene informaci6n muy
importante sobre su agua potable. Tradiizcalo
o liable con a1guien que to entienda bien.
Mahalaga ang impormasyong ito.
Ii
Mangyaring ipasalin ito
01 UtLA-t—= 00* 9--aVL-Ir*-
9 ILI it �—H 14 110-1 A A 1 —9 -If �j Al -2
zd�
This report is available for electronic viewing at
Pl-p qYi �v(
If you would
like a paper copy of the 2017 report mailed to your
home, please call
5i
The sources ofdrinking water (both tap water and bottled water) induderiveo`takesstreams ponds, reservoirs, springs, and groundwater
wells. As water travels over the surface of the land or through the ground, it dissolves naturally -occurring minerals and, in some cases,
radioactive material, and can pick up substances resulting from the presence of animals or from human activity.
Microbial contaminants, such asviruses
and bacteria, that may come from sewage
treatment plants, septic systems, wildlife,
and agricultural livestock operations.
Pesticides and herbicides, that may
come from avariety ofsources such as
agriculture, urban stormwaterrunoff, and
residential uses.
inorganic contaminants, such as sahs
and metals, that can benaturally-occurring
o/result from urban storm water runoff,
industrial ordomestic wastewater
discharges, oil and gas production, mining,
or farming.
Radioactive contaminants, that can be
natunaity-occurhngo/bethe result ofoil
and gas production and mining activities.
organic chemical contaminants,
including synthetic and volatile organic
chemicals, that are byproducts ofindustrial
processes and petroleum production, and
can also come from gas stations, urban
stormwatarrunoff, agricultural application,
and septic systems.
Spreading grounds located at the major inflows from the Rio Hondo and
San Gabriel Rivers of the Montebello Forebay, allow water from various
sources to artificially seep down into the Central Basin aquifers. The
ground acts as a natural filter to clean the water as it percolates through
the aquifers.
Downey's groundwater is pumped from the Central
Groundwater Basin. The Central Basin is a series of
large natural aquifers below the ground that stretch
from Los Angeles to Orange County.
The City of Downey conveniently overlies the Central
Basin. Groundwaterfrom the Central Basin is pumped
from 20 wells located within the City's boundaries and
provides the City with its principal source of potable
water. The City's service area is shown on the map to
the left.
The Central Basin receives natural inflows from the
conservation of rainfall and snow melt, artificial
inflows from imported and recycled water, as well as
groundwater underfloor from adjacent basins. Surface
water slowly percolates through the ground to the
aquifers and the ground acts as a natural filter to clean
the water.
operate,Trained water distribution
system operators
inspect, repair, and replace
critical components of our
s
- of
potable
water main
los- 23r500
V64
1Water Meters
10'r500
Isolation
Valves
am
1,800
Fire Hydrants
In order to ensure that tap water is safe to drink, the U.S. EPA and the SWRCB prescribe
regulations that limit the amount of certain contaminants in water provided by public water
systems. The SWRCB regulations also establish limits for contaminants in bottled water that
provide the same protection for public health.
U.S. Food and Drug Administration regulations and California law also establish limits
for contaminants in bottled water that provide the same protection for public health.
Additional information on bottled water is available on the California Department of Public
Health website: https://www.cdph.ca.gov/Programs/CEH/DFDCS/Pages/FDBPrograms/
Food Safety Progra m/Water.aspx
Drinking water, including bottled water, may reasonably be expected to contain at least
some contaminants. The presence of contaminants does not necessarily indicate that water
poses a health risk. More information about contaminants and potential health effects can
be obtained by calling U.S. EPA's Safe Drinking Water Hotline at 800-426-4791.
Lead and Copper
Lead can cause serious health problems if present at elevated levels,
especially for pregnant women and young children. Lead in drinking
water is primarily from materials and components associated with
service lines and home plumbing. Lead can be released when yourtap
water comes in contact with pipes and plumbing fixtures containing
lead. The City of Downey is responsible for providing high quality
drinking water, but cannot control the variety of materials used in
plumbing components. When your water has been sitting for several
hours, you can minimize the potential for lead exposure by flushing
your tap for 30 seconds to 2 minutes before using water for drinking
or cooking. If you do so, you may wish to collect the flushed water and
reuse it for another beneficial purpose, such as watering plants. If you
are concerned about lead in your water, you may wish to have your
water tested. Information on lead in drinking water, testing methods,
Common hazards in and around
your house can contaminate your
drinking water? The City's Public Works
Department Utilities Division, through
its Backflow Prevention Program, goes
to great lengths to protect the water
entering your home. However, we need
your help to protect the water on your
home's property.
and steps you can take to minimize exposure is available from the
Safe Drinking Water Hotline 800-426-4791 or at http://www.epa.gov/
safewater/lead
Important l Information
Some people may be more vulnerable to contaminants in drinking
water than the general population. Immuno -compromised persons
such as persons with cancer undergoing chemotherapy, persons
who have undergone organ transplants, people with HIV/AIDS or
other immune system disorders, some elderly, and infants can
be particularly at risk from infections. These people should seek
advice about drinking water from their health care providers. U.S.
EPA Centers for Disease Control (CDC) guidelines on appropriate
means to lessen the risk of infection by Cryptosporidium and other
microbial contaminants are available from the Safe Drinking Water
Hotline 800-426-4791.
Protect Your Home With Air Vacuum Breakers
Over half of the Nation's cross -connections involve unprotected
garden hoses. Check to see if you have air vacuum breakers installed
on each of your hose bibbs. They prevent waterfrom getting back into
the drinking water system. These simple devices are inexpensive and
can be purchased from your local hardware store. They are easy to
install, you just simply screw them onto the hose bibb.
EP
Avoid putting the garden
Avoid connecting your
Avoid putting the garden
hose into swimming
garden hose to a plant
hose down the drain to
pools or buckets to fill.
fertilizer or bug spray unit.
flush debris when it's
Water can flow back into
This can cause harmful
backed up. This can cause
the hose and into your
chemicals to flow back into
a serious health hazard.
home.
your home.
Contaminated water can
be drawn back into your
home's water supply.
The City of Downey is committed to supporting conservation efforts as part of our plan to provide a reliable water
supply for today and tomorrow. The City encourages everyone to took closely at their water usage habits and for ways
hmuse less water. Whether vueare inadry orwet year, there are always actions wwecan take toincrease long-term water
use efficiency.
Benefits of Adding Mulch in Gardens
Applying mulch tuthe top ufthe soil around plants wilt increase water retention and reduce the amount of water lost to evaporation by blocking the
sun which evaporates water from your soi L This keeps your so R cooler. Organic mulches may a [so fertilize the soil, provide visu a I a p pea I, and
help cut down on weeds. The best water savings advantages are gained by applying between 2 to 4 inches of mulch around p [ant beds.
Making LonChanges to Water Use
During the most recent drought, many residents living in the City of Downey instituted [on g -term changes to their water use by replacing turf
areas with low-water using plants, replacing older appliances and fixtures with water and energy efficient models, and making changes in
everyday water use habits.
f, — — " '\ Ouick Method to Detect Toilet Leaks
TOILET HAS A LEAK
(Blue water mbowl)
�
TOILET mFINE
'
(Clear water in bowl)
! �
Toilet leaks may beeasy torepair, but detecting them can beachallenge. Here ba
very quick and easy method tmhelp you detect atoilet leak.
2: Take off the tank lid.
2: Add zOdrops offood coloring liquid ora commercially available blue leak
detector tablet into tank.
3: Wait I5to3Dminutes (do not flush the toilet)
4: Check toilet bowl. If there is colored water in the toilet bowl, you have a leak!
How to Check Your Water Meter
A water meter is a device that measures the volume of water delivered to a property.
FLOW INOKAT02,
Checking the water meter can help you determine ifthere isewater leak.
"� �
��/��no��,����o�mvu��mn�����n�m��
"GUT 001:
Locate your water meter box and carefully nemovetheUd.(Becautiousofinsects
�
orother small animab).
-
2: Check your water meter 0usee ifthe flow indicator ursweep hand ismoving.
3: Amoving leak indicator or sweep hand shows that water is either being used or wasted.
-�� uxi
4: Besure tusecurely reattach the meter lid toprevent trip hazards.
�.
5: ifleak isdetected, repair leak within 48hours.
Water Quality Sample Testing Results
During 2018, we tested our water for over 100 regulated contaminants in order to determine the presence of any biological, inorganic,
table includes those contaminants that were detected
inthewater. Both federal and state regulations require us to monitor for certain substances less than once per year because the
concentrations of these substances do not change frequently. In these cases, the most recent sample data are included.
City of Downey 2018 Ground Water Data
Primary Standards (Monitored for Health Concerns)
Radlologicals
Gross Alpha Particle Activity (pCi/L)
15
(0)
IND
NO - 6.0
NO
Erosion of natural deposits
Uranium (pCi/L)
20
0.43
1.2
IND - 3.7
NO
Erosion of natural deposits
Volatile Organic Compounds
Tetrachloroethylene (PCE) (ppb)
5
0.06
No
NO - 2.7
NO
Discharge from factories, dry cleaners, and auto shops
(metal degreaser)
Trichloroethylene (TCE) (ppb)
5
1.7
IND
IND - 0.84
NO
Discharge from metal degreasing sites and other
— - - ----- - ---
factories
- -----
Inorganic Compounds
Arsenic (ppb)
10
0.004
ND
NO - 3.5
NO
Erosion of natural deposits; runoff from orchards; glass
and electronics production wastes
Discharge of oil drilling wastes and from metal refineries;
Barium (ppm)
1
2
IND
ND - 0.12
NO
erosion of natural deposits
Erosion of natural deposits; water additive which
Fluoride (ppm)
2
1
0.35
0.25-0.40
NO
promotes strong teeth; discharge from fertilizer and
aluminum factories
Nitrate as IN (ppm)
10
10
2.9
0.9-4.9
NO
Runoff and leaching from fertilizer use; leaching from
septic tanks and sewage; erosion of natural deposits
Secondary Standards (Monitored for aesthetic qualities) 2
Chloride (ppm)
(500)
n/a
72
31-92
NO
Runoff and leachingfrom natural deposits
Copper (ppm)
(1)
0.3
ND
ND - 0.2
NO
Erosion of natural deposits; leaching from wood
preservatives
Iron (ppb)
(300)
n/a
IND
ND -260
- -- . .........
NO
Leachingfrom natural deposits; industrial wastes
Odor (Units)
(3)
n/a
NO
ND -1.0
NO
Naturally occurring soluble mineral
Specific Conductance (VS/cm)
(1600)
n/a
753
290-920
NO
Substances that form ions when in water; seawater
influence
Sulfate (ppm)
(500)
n/a
106
33-150
NO
Runoff/leaching from natural deposits; industrial wastes
Total Dissolved Solids (ppm)
(1000)
n/a
482
220-660
NO
Runoff/leaching from natural deposits
Turbidity (NTU)
(5)
n/a
0.2
NO -1.0
NO
Soil runoff
Water Characteristics (No MCL or MRDL but state or federal monitoring required)
Alkalinity (ppm)
n/a
n/a
185
60-260
NO
Runoff and leaching from natural deposits
Calcium (ppm)
n/a
n/a
77
15-120
NO
Abundant naturally occurring element
Magnesium (ppm)
n/a
n/a
15
3.3-23
NO
Abundant naturally occurring element
pH (units)
(6.5-8.5)
n/a
7.6
7.2-8.1
NO
Hydrogen ion concentration
Potassium (ppm)
n/a
n/a
4.2
2.8-6.1
NO
Runoff or leaching from natural deposits
Sodium (ppm)
n/a
n/a
57
40-79
NO
Erosion of natural deposits
"Hardness" is the sum of polyvalent cations present
Total Hardness (grains per gallon)
n/a
n/a
15
3.0-22.8
NO
in the water, generally magnesium and calcium. The
cations are usually naturally occurring
Internal corrosion of household water plumbing systems;
Lead (ppb) 15 0.2 3.4 0 out of 52 NO discharges from industrial manufacturers; erosion of
natural deposits
Internal corrosion of household water plumbing
Copper (ppm) 1.3 0.3 0.26 0 out of 52 NO systems; erosion of natural deposits; leaching from wood
preservatives
-------------
Number of Schools that requested lead sampling in 2018: A total of I school submitted requests to be sampled for lead during 2018.
7T -TT
7 -7777T
1�
Federal Unregulated Contaminants Rule 4 (UCNIR 4)
Manganese (ppb) (50) n/a 1.1 ND - 2.2 NA Leaching from natural deposits
v
fly+
Detected Unregulated Contaminants
Hexavalent Chromium (ppb) n/a
Glossary of Terms/Abbreviations
Maximum Contaminant Level (MCL): The highest level ofa
contaminant that is allowed in drinking water. Primary MCLS
are set as close to the PHGs (or MCLGs) as is economically
and technologically feasible. Secondary MCLS (SMCLs) are
set to protect odor, taste, and appearance of drinking water.
Maximum Contaminant Level Goal (MCLG): The level of
contaminant in drinking water below which there is no known
or expected risk to health. MCI -Gs are set by the U.S. EPA.
Detection Limits for Purposes of Reporting (DLR):
The DLR is a parameter that is set by regulation by each
reportable analyte. It is not laboratory specific and it
is independent ofthe analytical method used (in cases
where several methods are approved). It is expected that a
laboratory can achieve a Reporting Limit that is lower than
or equal to the DLR set by the State. This is also known as
the Minimum Reporting Level (MRL).
1. The State allows us to monitor for some contaminants less
than once per year because the concentrations of these
contaminants do not change frequently. In these cases
the most recent data available is used.
2 There are no PHGs, MCI -Gs, or mandatory health effects
language forthese constituents because secondary MCLS
are set on the basis of aesthetics.
3. During the months of February, March, and September
of 2018, bacteriological quality of water served did
not meet the requirements ofthe Total Coliform Rule.
Coliform bacteria were detected in small portions ofthe
distribution system. Upon precautionary flushing and
chlorination, repeat samples eventually determined that
the water was total coliform free. Appropriate public
notification was provided at the time, in compliance with
regulations, Coliforms are bacteria that are naturally
Discharge from electroplating factories, leather
0.02 ND ND - 1.0 NO tanneries, wood preservation, chemical synthesis,
refractory production, and textile manufacturing
facilities; erosion of natural deposits
Primary Drinking Water Standard (PDS): MCLS and
MRDLs for contaminants that affect health along with their
monitoring and reporting requirements, and water treatment
requirements.
Public Health Goal (PG): The level of a contaminant in
drinking water below which there is no known or expected
risk to health. PHGs are set by the California Environmental
Protection Agency.
Regulatory Action Level: (AL): The concentration of a
contaminant which, if exceeded, triggers treatment or other
requirements that a water system must follow.
Level I Assessment; A Level I Assessment is a study of
water system to identify potential problems and determine
(if possible) why total coliform bacteria have been found in
the water system.
present in the environment and are used as an indicator
that other, potentially harmful, waterborne pathogens may
be present orthat a potential pathway exists through which
contamination may enter the drinking water distribution
system. We found coliforms indicating the need to look for
potential problems in watertreatment or distribution. When
this occurs, we are required to conduct assessment(s) to
identify problems and to correct any problems that were
found during these assessments. During the past year we
were required to conduct one Level I Assessment. One Level
I Assessment was completed. In addition, we identified
potential issues, requiring us to take 6 corrective actions. We
completed all 6 of these actions. During the past year one
Level 2 Assessment was required to be completed for our
water system. One Level 2 Assessment was completed. In
addition, we were required to take 14 corrective actions and
we completed 14 of these actions,
Level 2 Assessment: A Level 2 Assessment is a detailed
study of a water system to identify potential problems and
determine (if possible) why an (Escherichia coli) (E. coli) MCL
violation has occurred and/or why total coliform bacteria
have been found in the water system on multiple occasions.
NA: Contaminant or property was not analyzed.
No: Contaminant was not detected. The contaminant is less
than the DLR.
n/a: Not applicable
Units of Measurement:
ppm: parts per million
ppb: parts per billion
pCl/L: picocuries per liter
p5/c: micro Siemens per centimeter
%: percent
4 Lead and Copper testing results are based on triennial
monitoring within residential taps. Results are based on
2017 monitoring.
5. Data from City of Downey Wells were collected in 2018 for
Unregulated Chemical Monitoring Rule 4, Unregulated
contaminant monitoring helps USEPA and the State Water
Resources Control Board to determine where certain
contaminants occur and whether the contaminants need
to be regulated.
6. There is currently no MCL for hexavalent chromium.
The previous MCL of 10 ppb was withdrawn on
September 11, 2017.
For additional questions about your water quality
please contact:
Bridgeth Tapia at (562) 904-7202
9252 Stewart & Gray Rd, Downey, CA 90241
I llg,"f 7 " ''"" 1111117,' ', I
"j,
W l
Water Quality
Bridgeth Tapia at (562) 904-7202
9252 Stewart & Gray Rd,
Downey, CA 90241
Rebates & Conservation Tips:
bewaterwise.com (888) 376-3314
Report Water Waste
Public Works Utilities Division (562) 904-7202
USEPA Safe Drinking Water Hotline
httPs://www.epa.gov/ground-water-and-drinking
water/safe-drinking-water-hotline
(800) 426-4791
Public Health Related issues
www.publichealth.lacounty.gov
www.epa.gov/watrhome
www.cdc.gov
This report contains important information about your drinking water.
Please contact the City of Downey Public Water System at 562-904-7202
for assistance.
Este informe contiene informaci6n muy importante sobre su agua para
beber. Favor de comunicarse con City of Downey Water System a[ numero
562-904-7202 para asistirlo en espahol.
Ang pag-uu[at na ito ay naglalaman ng ma-halagang impormasyon
tungkol sa inyong inuming tubig. Mangyaring makipag-ugnayan sa City of
Downey Water System o turnawag sa 562-904-7202 para matulungan sa
wilkang Tagalog.
01 J_ -:1-1 Al — U.1- Ll A All zim oil J_* 7} _e_ t 161 IL � � WJ-61-3-1 01 _A` 1-11* a}
J-01 --5'- z t] tIA] T_q City of Downey
State Water Resources Control Board
http://www.waterboards.ca.gov/drinking-water/
(818) 551-2004
City of Downey Water Conservation &
Restrictions
http://www.downeyca.org/depts/pw/utilities/
water_conservation.asp
You are welcome to attend the following public meetings at City Hall,
11111 Brookshire Ave.
City Council Meetings
Held on the second and fourth Tuesday of each month at 6:30 p.m.
Public Works Committee Meetings
Held on the third Thursday of each month at 4:00pm.
...........
i.
CityofDowney
............. .......
City of Downey I Department of Public Works
Utilities Division
11111 Brookshire Ave I Downey,CA90241
1�6 �@ k �Ze
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF DOWNEY
APPROVING AND ADOPTING THE CITY OF DOWNEY WATER SYSTEM
2019 PUBLIC HEALTH GOALS REPORT
WHEREAS, provisions of the California Health and Safety Code (HSC), Section 116470,
specify that a public water system serving more than 10,000 service connections must prepare
a Public Health Goals (PHGs) Report every three years that provides information on the
"detection" of any contaminants in the public water system during the previous three calendar
years that exceed the PHGs for those contaminants.; and
WHEREAS, the City is an urban supplier of water providing water to a population of
approximately 113,000 through approximately 23,500 service connections; and
WHEREAS, the City provides approximately 15,000 acre-feet of water to its customers
on an annual basis; and
WHEREAS, the City of Downey Water System 2019 PHG Report (Report) has been
prepared; and
WHEREAS, the HSC requires that the Report be made available for public review and
that a public hearing be held prior to adoption of the Report; and
WHEREAS, the City has, therefore, prepared and made available for public review at
the City Clerk's office, Public Works Department Counter, and on the City's website, draft copies
of the Report, and provided proper notice of the Public Hearing to be held before the City
Council of the City of Downey on January 14, 2020; and
WHEREAS, all remarks and suggestions brought to the attention of the City were
considered prior to the approval and adoption of the Report.
NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF DOWNEY DOES
HEREBY RESOLVE AS FOLLOWS:
SECTION 1. The City of Downey Water System 2019 Public Health Goals Report is
hereby approved, adopted, and ordered filed with the City Clerk;
SECTION 2. The City Clerk shall certify to the adoption of this Resolution.
I 11!111111��Ijjiill 1: 1 1 . I I
■
MARIA t DUARTE, CIVIC, City Clerk
%'.'ity Clerk
I HEREBY CERTIFY that the foregoing Resolution was adopted by the City Council of
the City of Downey at a regular meeting held on the 14 th day of January, 2020, by the following
vote, to wit:
AYES:
Council Members:
NOES:
Council Member:
ABSENT:
Council Member:
ABSTAIN:
Council Member:
MARIA ALICIA DUARTE, CIVIC, City Cle
City Clerk I