HomeMy WebLinkAboutResolution No. 23-8201 - Approving and Adopting Water System 2022 Public Health Goals ReportRESOLUTION NO. 23-8201
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF DOWNEY
APPROVING AND ADOPTING THE CITY OF DOWNEY WATER SYSTEM 2022
PUBLIC HEALTH GOALS REPORT
WHEREAS, Section 116470(b) of the California Health and Safety Code specifies 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 that exceed the applicable PHGs for those contaminants;
and
WHEREAS, the City of Downey is an urban supplier of water ,providing water to a
population of approximately 111,000 through approximately 23,500 service connections; and
WHEREAS, the City provides approximately-14,000 acre-feet of potable water to its
customers on an annual basis; and
WHEREAS, the City of Downey WaterSystem2022 PHG Report (Report) has been
prepared; and
WHEREAS, Section 116470(c) 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 November 14, 2023; 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 2022 PublicHealth Goals Report, a copy
of which is attached as Exhibit A, is hereby approved and adopted.
SECTION 2. The City Clerk shall certify to the adoption of this Resolution.
APPROVED AND ADOPTED this 14th day of November, 2023.
CL UDIA M. FROMETA, Mayor
ATTEST:
KAARIA ALICIA DUARTE, WC
City Clerk
RESOLUTION NO. 23-8201
PAGE 2
APPROVED AS TO FORM:
JQf4N M. FUNK
City Attorney
HEREBY CERTIFY that the foregoing Resolution was adopted by the City Council of the
City of Downey at a Regular meeting held on the 14th day of November, 2023, by the following
vote, to wit:
AYES: Council Members: Horn, Sosa, Trujillo, Frometa
NOES: Council Members: None.
ABSENT: Council Members: None.
ABSTAIN Council Members: None.
A ALICIA DUARTE, C
City Clerk
f
Public It r
Background
The 2022 Public Health Goals (PHG) Report for the City of Downey Water System has been
prepared in laccordance with Section 116470 of the California Health and Safety Code, (HSC),
which requires public water systems serving more than 10,000 service connections to
provide information on the "detection" of any contaminant(s) exceeding a Public Health Goal
(PHG) level.
The City's 2022 PHG Report is based on water quality analyses completed during calendar
years 2019, 2020, and 2021, 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 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.
The purpose of this report is to provide water customers with information on contaminants
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 contaminant(s) 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).
Drinking Water Standards, MCLs, P;FIGs and MCLGs
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. The MCL is the highest level of a contaminant
allowed in drinking water. State MCLs cannot be less stringent than federal MCLs. MCLs are
set at levels that fake into consideration the cost of compliance based on available treatment
technology for the contaminant. Adopted MCLs are the criteria utilized to ensure that a public
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water system is in compliance with drinking water standards. California Health and Safety
Code Section 116365(a) requires MCLs to be established at a level as close to its PHG as is
technologically and economically feasible, placing primary emphasis on the protection of
public health. Therefore, drinking water which meets SWRCB DDW standards is associated
with little to no risk.
PHGs set by CIEHHA 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
analytical detection capability, availability of treatment technology, benefits, capital costs,
and ongoing operational costs which are considered by the USEPA and SWRCB DDW 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 2019
and 2021 for the purposes of determining compliance with drinking water standards were
considered in preparing this Report. Such water quality data were summarized in the City's
2019, 2020, and 2021 Annual Water Quality Reports (Consumer Confidence Report 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 2022 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 type of risk
to health that could be associated with each constituent level, and an estimate of 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 Technologies
which are the best known methods of reducing contaminant levels to the MCL. However,
since many PHGs and MCLGs are set much lower than the MCLs, it is not always possible or
feasible to determine what treatment is needed to further reduce a constituent down to or
near the PHG or MCLG for a particular constituent, many of which are set at zero.
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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
available analytical methods. In some cases, installing a treatment facility to further reduce
levels of one constituent that is already at a very low level may also cause adverse effects on
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.
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 PHG, or the MCLG. The table below is a
summary of those constituents, BATS, and numerical health risk.
Constituents
Units
MCL
PHG or
Detectio
Detection
Numerical
Numerica
BATS
Aggregate
(MCLG)*
n
Range
Cancer Risk
I Cancer
Cost Per
Average
1 at PHG or
Risk tat
Year
MCLG
MCL
(Million)
Arsenic
mg/L
0.010
0.000004
1
0.00119
0-0.0035
1x10-1
2.5x10-3
1
RO
$10.68
Tetra chloroethylene
mg/L
0.005
0.00006
0.00029
0-0,0036
1x10-6
8XI0-5
GAC
$11.93
(PCE)
Gross -Alpha
pCi/L
15
(0)
1.77
0-6.0
0
1X10-3
RO
$12;57
Uranium
pCi/L
20
0.43
0,93
0-3.7
1X10-6
5x10-5
RO
$7.54
Lead 2 Action Level
mg/L
0.015
0.0002
0.0034
NA
<IXI0-6
2X10-6
cc
(PHG is not
based on
this effect)
Total Coliform
%
5%
(0)
1.21
0-15.7
NA
NA
D
Positive
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NOTES: TREATMENT/CONTROL TECHNOLOGIES
*MCLGs are shown in parenthesis. MCLGs are GAC=Granular Activated Carbon
provided only when no applicable PHG exists. RO=Reverse Osmosis
CC=Corrosion Control
Cancer Risk= Upper estimate of excess cancer risk D=Disinfection
per number of people exposed, resulting from IE= Ion Exchange
lifetime exposure. Actual cancer risk may be lower or RCF= Reduction- Coagulation -Filtration
zero. Based on the OEHHA PHG technical support TERMS/ABBREVIATIONS:
document unless otherwise specified.
NA=Not Applicable
z AL= Action Levels for copper and lead refer to a AL=Action Level
concentration measured at the tap. .Much of the BAT=Best Available Technology
copper and lead in drinking water is derived from mg/L=milligrams per liter or parts per million
household plumbing (The Lead and Copper Rule, Title pCi/L= picoCuries per liter
22, California Code of Regulations -[CCR] Section MCL= Maximum Contaminant Level
64672.3). "MCLG=Maximum contaminant Level Goal
PHG=Public Health Goal
Arsenic
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 estimates were based
on a low -dose linear extrapolation approach although the mode of carcinogenic action is
not fully understood.
The applicable BAT identified to treat arsenic is Reverse Osmosis (RO) treatment. The 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 $10.68 Million annually, which
includes construction and annual operational cost. This translates into an annual cost of
$454 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
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in humans who are exposed over long periods of time. However, per the SWRCB, MCLs
are established at levels as close to their PHG as is technologically and economically`
feasible, placing primary emphasis on the protection of public health therefore water
which meets the drinking water standard (the MCL) is associated with little to no risk 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 $11.93 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 $508per 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, but 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 laboratory animals also may 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 that
the cost to install and operate RO systems at the City's well sites to meet the PHG levels
would be up to approximately $20.11 Million annually, which includes construction and
annual operational costs. This translates into an annual cost of $856 per water service
connection.
Lead
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.
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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 90tn 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.
Based on the last round of sampling for lead and copper in 2020, the 90th percentile value
for lead was 0.0039 mg/L and 0.2 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 DDW to have "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 monitor its water quality parameters
that relate to corrosivity, such as the pH, hardness, 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.
WolffVNIUMMIMF
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 potential presence of
pathogens, therefore, it is not possible to quantify specific numerical health risk.
Coliform bacteria are an indicator organism that are ubiquitous in nature and are not
generally considered harmful. They are used becauseofthe 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 City
collects 25 total coliform samples weekly throughout the distribution system. During the
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3 year period from 2019 to 2021, monthly positive total coliform percentage results had
an average detection of 1.21% and ranged from 0% to 15.7%. 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 no
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
program, maintaining positive pressures in the water distribution system, and conducting
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 for these four
constituents could cost up to $42.72 Million per year, or $1,818 per service connection per
year. It is important to note that this cost estimate is for treatment of only the four
constituents noted above and does not include costs associated with demolition, property
acquisition, groundwater well pump and motor improvements necessary to overcome the
increase in pressure loss associated with the treatment facilities, and increased electricity
costs. Therefore; the estimated total cost to treat arsenic, gross alpha, uranium, and PCE to
PHG levels would be even greater than the estimate noted above.'
Recommendations for Further Action'
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 drinking
water with primary emphasis placed on public health. The effectiveness of the treatment
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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.
Attachment
1.'Table of Regulated Contaminants with MCLs, PHGs or MCLGs
2. "Water Quality Report for 2019.
3. Water Quality Report for 2020.
4. Water Quality Report for 2021.
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ATTACHMENT NO. 1
MCLs, DLRs, and PHGs for Regulated Drinking Water Contaminants
(Units are in milligrams per liter (mg/L), unlessotherwise noted.)
Last Update: January 1, 202
This table includes.
California's maximum contaminant levels (MCLs)
Detection limits for purposes of reporting (DLRs)
Public health goals t'HGs} from the Office of Environmental Health Hazard Assessment LQEHHA
Also, the PHG for NDMA (which is not yet regulated) is included at the bottom of this table.
Regulated Contaminant
MCL
I DLR
PHG
Date of PHG
Chemicals with MCLs in 22 CCR §64431-Inorganic Chemicals
Aluminum
1
0.05
0.6
2001
Antimony
0.006
0.006
0.001
2016
Arsenic
0.010
0.002
a000004
2004
Asbestos (MFL = million fibers per liter; for fibers >10
microns long)
7 MFL
0.2 MFL
7 MFL
2003
Barium
-1
0.1
2
2003
Beryllium
0.004
0.001
0.001
2003
Cadmium
0.005
0.001 -
0.00004
2006
Chromium; Total- OEHHA withdrew the 0.0025-mg/L
PHG
0.05
0.01
withdrawn
Nov. 2001
1999
Chromium, Hexavalent - 0.01-mg/L MCL & 0.001-
mg/L DLR repealed September 2017
--
--
0.00002
2011
Cyanide
0.15
0.1 _
0.15
1997
Fluoride
2
0.1
1
1997
Mercury (inorganic)
0.002
0.001
0.0012
1999
(rev2005)*
Nickel
0.1
0.01
0.012
2001
Nitrate (as nitrogen, N)
10 as N
0.4
45 as
-NO3 (=10
2018
Nitrite (as N)
1 as N
0.4
1 as N
2018
Nitrate + Nitrite (as N)
10 as N
--
10 as N
2018
Perchlorate
0.006
0.002
0.001
2015
Selenium
0.05
0.005
0.03
2010
Thallium
0.002
0.001
0.0001
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
1.3
0.05
0.3
2008
Lead
0.015
0.005
0.0002
2009
Radionuclides with MCLs in 22 CCR §64441 and §64443--Radiological
[units are;pieocuries per liter (pGi/L), unless otherwise stated; n/a not applicable]
Gross alpha particle activity - OEHHA concluded in
2003 that a PHG was not practical
15
3
none
n/a
Gross beta particle activity - OEHHA concluded in
2003 that a PHG was not practical
4
mrem/yr
4
none
n/a
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 (VQCs)
Benzene
0.001
0.0005
0.00015
2001
Carbon tetrachloride
0.0005
0.0005
0.0001
2000
1,2-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
(rev2005)
1, 1 -Dichloroethylene (1,1-DCE)
0.006
0.0005
0.01
1999
cis- 1,2-Dich loroethylene
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
0.0005
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
Monochlorobenzene
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
Tiichooroethylene (TCE)
0.005
0.0005
0.0017
2009
Trichlorofluoromethane (Freon 11)
0.15
0.005
1.3 -
2014
1,1,2-Trichloro-1,2,2-Trifluoroethane (Freon 113)
1.2
0.01
4
1997
rev2011
Vinyl chloride
0.0005
0.0005
0.00005
2000
Xylenes
1.75
0.0005
1.8
1997
(b) Nan -Volatile Synthetic Organic Chemicals (SOGs)
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
0.0001
0.0001
0.00003
1997
(rev2006)
Chlorobenzene
0.07
0.00085
0.07
2014
Dalapon
0.2
0.01
0.79
1997
(rev2009)
1,2-Dibromo-3-chloropropane (DBCP)
0.0002
0.00001
0.000003
2020
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
0.1
0.045
0.094
2014
Endrin
0.002
0.0001
0.0003
2016
Ethylene dibromide (EDB) (1,2-Dibromoethane)
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
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
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
Trich lorofluorom ethane (FC-11)
0.15
0.00015
1.3
2014
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-$ '
5x10-I
5x10-"
2010
2,4,5-TP (Silvex)
0.05
0.001
0.003
2014
l
Chemicals with MCLs in 22 CCR §64 33—Disinfection Byproducts
Total Trihalomethanes 0.080
--
--
--
Bromodichloromethane
--
0.0010
0.00006
2020
Bromoform
--
0.0010
0.0005
2020
Chloroform
--
0.0010
0.0004
2020
Dibromochloromethane
--
0.0010
0.0001
2020
Haloacetic Acids (five) (HAA5)
0.060
--
--
--
Monochloroacetic Acid
--
0.0020
--
--
Dichloroacetic Adic
--
0.0010
--
--
Trichloroacetic Acid
--
0.0010
--
--
Monobromoacetic Acid
--
0.0010
--
Dibromoacetic Acid
--
0.0010
--
--
Bromate
0.010
0:0050**
0.0001
2009
Chlorite
1.0
0.020
0.05
2009
Chemicals with PHGs established in response to DDW requests. These are not currently regulated
drinking water contaminants.`
N-Nitrosodimethylamine (NDMA)
--
--
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.
C
4
Contaminants rat May Be Present in SourceWater Include
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 (and 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 as viruses Inorganic contaminants, such as salts and Organic chemical contaminants, including
and bacteria that may come from sewage metals; that can be naturally -occurring or synthetic and volatile organic chemicals, that
treatment plants, septic systems, wildlife, resultfromurban storm water runoff, industrial are byproducts of industrial processes and
and agricultural livestock operations. or domestic wastewater discharges, oil and petroleum production, and can also come
Pesticides and herbicides, that may come gas production, mining, or farming, from gas stations, urban stormwater runoff,
from a variety of sources such as agriculture, Radioactive contaminants, that can be agricultural application, and septic systems.
urban stormwater runoff, and residential uses. naturally -occurring or be the result of oil and
gas production and mining activities.
w
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.
,.,
Groundwater from the Central Basin is pumped from ZO
3
wells located within the City's boundaries and provides the
City with its principal source of potable water. The City's
servicearea 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
underflow from adjacent basins. Surfacewaterslowly
percolates through the ground to the aquifers and the
ground acts as_a natural filter to clean the water,
t�
\ E
Trained ti fix
waterND
system operators operate,
inspect, repair, and replace
\critical
components of our
rsarx
drinking infrastructure.
t; o as i r pies
za,weadinnot Grounds
ti
� J
:Miles of Potable
Water Main
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
s
acts as a natural filter to clean the 'water as it percolates through the aquifers.
Water Meters
D& S 0 S13, 0 01,41"
r. 4.
. „
"
N
Isolation Valves
NJ
N Fire Hydrants
Federal and State Water
Quality Regulations
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/FoodSafetyProgram/
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.
:he drain to
when it's
its can cause
olth hazard.
water can
ck into your
supply.
TOILET HAS A LEAK Toilet
(Blue water in bowl) Ouick Method to Detect
TOILFTISFINE Toilet leaks maybe easy to repair, but detecting them can be a challenge. Here is a very quick
ICIear,",erInbowl ) ,, and easy method to help you detect a toilet leak.
k+r 1: Take offthe tank lid.
2: Add 10 drops of food coloring liquid or a commercially available blue leak detector
tablet into tank.
3: Wait 15 to 20 minutes (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 SWEEP HAND
FLOW INDICATOR,,
A water meter Is a device that measures the volume of water delivered to a property. th,
rs 6:<t1 seAer U,
Checking the water meter can help you determine if there is a water leak. REGISTER 0 4
(Note: Moke sure no water is bding used inside or outside your home white performing this test).
1: Locate your water meter box and carefully remove the lid. (Be cautious ofinsectsorothersmallanimais); ...
2s Check your watermeterto see if the flow indicator or sweep hand is moving.
3: A moving leak indicator or sweep hand shows that water is either being used or wasted. 4 e�
s
4: Be sure to securely reattach the meter lid to prevent trip hazards.
5: If leak is detected, repair leak within 48 hours.
�u Q s1�.... .t.,
1 : October 1 -April 30 SPRING/SUMMER: May 1 - September 3
ODD Numbered rases'. (Ending in 1, 31 ' , 7$
Mond s, Wednesdays and/car Fridays''
EVEN Numbered dsssm (Ending i , ;
Tuesday, Thursday, and/or SaturdaysNO WATERING �
BETWEEN
*Penalties asp to $500 per day for noncompliarice may be enforced
QualityWater
During 2019, we tested our water for over 100 regulated contaminants in order to determine the presence of any biological, inorganic,
volatile organic or synthetic organic, and radioactive contaminants. The following table includes 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. -
®ty of Downey 2019 Groundwater Data'
r
r%say n l�iufd fr;6tisn u }
Gross Alpha Particle Activity (pCi/L) 15 (0) ND ND-6.0 NO Erosion of natural deposits
Uranium(pCi/L) 200.43 1.2 ND-3.7 NO Erosion of natural deposits
Tetrachtoroethylene (PCE) (ppb) 5 0.06 ND ND - 3.0 NO Discharge from factories, dry cleaners, and auto shops
(metal degreaser) ?
Trichloroethylene (TCEj (ppb) 5 1.7 ND ND -1.0 NO Discharge from metal degreasing sites and other
factories
Arsenic,(ppb} 10 0.004 ND ND -3.5 NO Erosion of natural deposits; runoff from orchards; glass
and electronics production wastes
Barium, (ppm) 1 2 ND ND -0.11 NO Discharge of oil drilling wastes and from metal refineries;
erosion of natural, deposits
1 Erosion of natural deposits; water additive which
Fluoride (ppm) ; 2 1 0.34 0.25-0.41 NO promotes strong teeth; discharge from: fertilizer and
aluminum factories
Nitrate as N (ppm) 10 10 3.3 1.1- 4.9 NO Runoff and leaching from fertilizer use; leaching from
septic tanks and sewage•, erasion of natural deposits
'Sirrondary standards(Monitored iti s ettsqualities)a
Chloride (ppm) (500) n/a 77 31-93 NO Runoffand leaching of natural deposits
Odor (Units) (3) n/a ND ND-1.0 NO Naturally occurring organic materials
Specific Conductance (µS/cm) (1600) n/a 729 290 - 900 NO Substances that form ions when in water; seawater
influence
Sulfate (ppm) (500) n/a 106 33 -180 NO Runoff/leaching from natural deposits; industrial wastes
l
i Total Dissolved Solids (ppm) (1000) n/a 471 220 -680 NO Runoff/leaching from natural deposits;
Turbidity (NTU) (5) n/a 0.1 ND - 0.5 NO Soil runoff
Water h r steel (No MCL or Mil but state orfederal monitoring required)
Runoff and leaching from natural deposits; carbonate,
Alkalinity (ppm) n/a ! n/a 163 49 -260 NO bicarbonate, hydroxide,and occasionally borate,
silicate and phosphate
Calcium (ppm) rl n/a 76 15 -120 NO Abundant naturally occurring element'
Magnesium (ppm) n/a n/a 15 3.3-24 NO Abundant naturally occurring element
PH (units) (6.5-85) n/a 7.5 7.2-8.1 NO Hydrogen ion concentration
Potassium (ppm)' n/a + n/a 4.3 2.8 -5.5 NO Runoff or leaching from natural deposits
t
Sodium (ppm) n/a n/a 57 40 -'68 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 -24 NO in the water, generally magnesium and calcium. The
cations are usually naturally occurring
t_cau aII UuppvI di Idtyz es Ore udseu LIT I glen I I Idl niurn Liar Ing witnin resioenual taps mrougnout the community. t<esutts are Dasea on 2U1 f monitoring.
Internal corrosion of household water plumbing systems;
t Lead (ppb) 15
0.2 3.4 0 out of52 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
.... ,, a
4 Federal Unregullatod Contaminants Rule 4 (UCMR 4)s
Manganese (ppb) (50)
n/a 11 ND 1.4 NA Leaching from natural deposits
Glossary of Terms/Abbreviations
Maximum Contaminant Level (MCL): The highest level of a
primary Drinking Water Standard (PDWS): MCLs and
Level 2 Assessment: A Level 2 Assessment is adetailed
contaminant that is allowed in drinking water. Primary "MCLs
,MRDLs for contaminants that affect health along with their
study of a water system to identify potential problems and
are set as close to the PHGs (orMCLGs) as is economically and
monitoring and reporting requirements, and water treatment
determine (if possible) why an(Escherichia coli) (E. coli) MCL
technologically feasible. Secondary MCLs (SMCLs) are set to
requirements.
violation has occurred and/or why total coliform bacteria
protect odor; taste, and appearance of drinking water.
have been found in the water system on multiple occasions.
Public Health Goal (PHG): The level of a contaminant in
Maximum Contaminant Level Goal (MCLG)t The level of a
drinking water below which there is no known or expected
NA: Contaminant or property was not analyzed.
contaminant in drinkingwater below which there is no known or
.risk to health. PHGs are set by the California Environmental
ND: Contaminant was not detected. The contaminant is less
expected risk to health. MCLGs are set by the U.S. EPA,
Protection Agency.
than the DLR.
Detection's Limits for Purposes. of Reporting (DLR):
Regulatory Action Level: (AL): The concentration of a
NTU: Nephelometric Turbidity Units
The DLR is a parameter that is set by regulation by each
contaminant which, if exceeded, triggers treatment or other
Units of Measurement:
reportable analyte. It is not laboratory specific and it
requirements that a water system must follow.
is independent of the analytical method used (in cases
ppm:: parts per million
where several methods are approved). It is expected that a
Level 1 Assessment: A Level 1 Assessment is a study of a
ppb: parts per billion
laboratory can achieve a Reporting Limit that is lower than
water system to identify potential problems and determine (if
pCi/Li picocunes per liter
or equal to the DLR set by the State. This is also known as the
possible) why total coliform bacteria have been found in'the
Minimum Reporting Level (MRL).
water system.
µS/cm: micro Siemens per centimeter -
:percent
Footnotes:
"1. The State allows ustomonitor for some contaminants less
harmful, waterborne pathogens may be present or that
S. Data from City of Downey Wells were collected in 2018
than once per year because the concentrations of these
a potential pathway exists through which contamination
and 2019 for Unregulated Chemical Monitoring Rule 4.
contaminants do not change frequently. In these cases the
may enter the drinking water distribution system. We
Unregulated contaminant monitoring helps USEPA and
most recent available is used.
found coliforms indicating the need to took for potential
the State Water Resources Control Board to determine
2. There are no PHGs MCI -Gs, or mandatory health effects
Problems in water treatment or distribution. When this
where certain contaminants occur and whether the
language for these constituents because secondary MCLs
occurs, we are required to conduct assessment(s) to
contaminants need to be regulated.
are set on the basis of aesthetics.
identify problems and to correct any problems that were
found during these assessments. During the past year one
3. During the month of April of 2019, bacteriological quality
Level 2 Assessment was required to be completed for our
of water served did not meet the requirements of the
watersystem. One Level 2 Assessment was completed. In
'
Total Coliform Rule Coliform bacteria were detected in
small portions of the distribution system. Repeat samples
addition, we were required to take 6 corrective actions and
we completed all of these actions.
For additional questions about
eventually, determined that the water was total coliform
free. Appropriate public notification was provided at
4. Lead and Copper testing results are based on triennial
your water quality please contact:
Bridgeth`Tapia at(562) 904-7202
W
the time, in compliance with regulations. Coliforms are
monitoring within residential taps. Results are based on
9252 Stewart & Gray Rd, Downey, CA 90241
bacteria that are naturally present in the environment
2017 monitoring,
and are used as an indicator that other, potentially
Water Quality U5EPA Safe Drinking Water Hotline state Water Resources Control Board
Bridgeth Tapia at (562) 904-7202 https://www.epa.gov/ground-water-and-drinking- http:l/www.waterboards.ca.gov/drinking water/
9252 Stewart & Gray Rd, water/safe-drinking-water-hotline (818) 551-2004
Downey, CA 90241 (800) 426-4791
City of Downey Water Conservation &
Rebates & Conservation Tips: Public Health Related Issues Restrictions
bewaterwise.com (888) 376-3314 www.publicheatth.lacounty.gov www.downeyca.org/our-city/departments/
www.epa.gov/ground-water-and-drinking-water pub Iic-works/utilities/water-conservation
Report Water Waste www.cdc.gov
Public Works Utilities Division (562) 904-7202
Important nmn Public Involvement
This report contains important information about your drinking water. You are welcome to attend the following public meetings at City Hatt,
Please contact the City of Downey Public Water System at"562-904-7202 11111 Brookshire Ave.
for assistance.
City Council Meetings
Este informe contiene informacion muy importante sobre su agua para Held on the second and fourth Tuesday of each month at 6:30 p.m.
beber. Favor de comunicarse con City of Downey Water System a[ numero
562-904-7202 para asistirlo en espanol. - Public Works Committee Meetings
Held on the third Thursday of each month at 400pm.
Ang pag-uutat na ito aynaglalaman ng ma-halagang impormasyon tungkol sa
inyong inuming tubig. Mangyaring makipag-ugnayansa City of Downey Water
System o tumawag sa 562=904-7202 para matulungan sa wikang Tagalog.
I 1�_ _ ,] of 1, A] A - oil X" ' L K)
2�1 5- z -1 a} k] Ld City of Downey
h o
0
I
�.y
from 20'wells located within the City's boundaries
k 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 wet[
as groundwater underflow from adjacent basins.
ti
' Surface water slowly percolates through the ground
l` to the aquifers and the ground acts as a natural fitter
ks� to clean the water.
Trained water distribution
system operators
operate,
inspect, e pair, and replace
critical components
drinking water infrastructure
g� &P'..LRa ld4lt`R i4 3 n z w is 3'"
e fi
Z {{Y
6 05 1 Miles m
0 t 11 V 4 .. b . . 0't a . +b
Protecting Our
Protect Your Home With Air Vacuum Breakers
over half of the Nation's cross -connections involve
Water from
' unprotected "garden hoses. Check to see if you have air
vacuum breakers installed on each of your hose bibbs. They
prevent water from getting back into the drinking water
system: These simple devices are inexpensive and can be
I Me,
purchased from your local hardware store. They are easy to
il install, you just simply screw them onto the hose Bibb.
a
.. �,. ID t �
'low
Did you kno
,k
Common hazards in and around
-our house can contaminate your
rinking water? The City's Public
/orks Department Utilities Division, Avoid putting the garden Avoid connecting your Avoid putting the garden hose
nrough its Backflow Prevention hose into swimming pools garden hose to a plant down the drain to flush debris
Program, goes to great lengths to or buckets to fill. Water fertilizer or bug spray unit. when it's backed up. This can
protect the water entering your home. can flow - back into the This can cause harmful cause a serious health hazard.
However, we need your help to protect hose and into your home. chemicals to flow back Contaminated water can be
the water on our home'sproperty. into your home. drawn back into your home's
y water supply.
TOILET HAS A LEAK t M „ : t i'a st a d t xi) Detect
(Flue water in bawl)
Toilet leaks maybe easy to repair, but detecting them can be a challenge. Here is a very quick
TOILET IS FINE
�, .and easy method to help you detect a toilet leak.
� (Clear water In bowl)
1: Take off the tank lid.
2: Add 10 drops of food coloring liquid or a commercially available blue leak detector
tablet into tank.
3: Wait 15 to 20 minutes (do not flush the toilet)
4: Check toilet bowl. If there is colored water in the toilet bowl, you have a leak!
3a d'wto C tgo4 Water,
4. L Meter
a ...
SWEEP HAND
A water meter is a device that measures the volume of water delivered to a property. SLOW INDICATOR
s=st s
!♦tha�arxmmn�tl ar t
Checking the water meter can help you determine if there is a water leak: �xcaunne Itn '�
(Nate: Make sate no water is being used inside or outside your home while performing this test).
1: Locate your water meter box and carefully remove the lid. (Be cautious of insects orothersmall animals)_
2: Check your water meter to see if the flow indicator or sweep hand is moving.
3: A moving leak indicator orsweep hand shows that water is either being used or wasted.
4: Be sure to securely reattach the meter lid to prevent trip hazards.
5: " If leak is detected, repair leak within 48 hours.
4""',
3 a h "G't ,s h 3 £� ti', r 4 v '' s "vy t e. y ,a'' !u. u $ ter
ti
t t �z L a:... T��x �+ � � A,a 2 �w s.. # F«,r r ,..:`s t tt. i, < c t S �L t 'rv9" k y i r t `. , �` t t 4 t
a � C.�a" t �� �.C4�T
t'
0 -1.9 NO Naturally present in the environment
t T " e
PFOA can be found in air, water and soil, as well as products such as: stain
Perf(uorooctanoic Acid resitant coatings on carpet, clothing, furniture, paper packaging for food,
(PFOA) (ppt) n/a n/a 14.47 6 - 20 NA personal care and beauty products, firefighting foam, non-stick coatings on
cookware; and surface water, runoff and soil that have been in contact witn
firefighting foam.
PFOS can be found in air, water and soft, as well as products such as: stain
Perfluorooctanesulfonic resitant coatings on carpet, clothing,furniture, paper packaging for food,
Acid (PFOS) (ppt) n/a n/a 37.08 22 - 63 NA personal care and beauty products, firefighting foam, non-stick coatings on
cookware; and surface water, runoff and soil that have been in contact with
firefighting foam.
k s ary of Terms/Abbreviations
Maximum contaminant Level (MCL): The highest level of a Primary Drinking Water Standard (PDWS)i MCLs and Level 2 Assessment: A Level 2 Assessment is a detailed
contaminant that is allowed in drinking water. Primary MCLs MRDLs for contaminants that affect health along with their study of a water system to identify potential problems and
are set as close to the PHGs (or MCLGs) as is economically and monitoring and reporting requirements, and water treatment determine (if possible) why an (Escherichia soli) (E. coli) MCL
technologically feasible. Secondary MCLs (SMCLs) are set to requirements. violation has occurred and/or why total coliform bacteria
protect odor, taste, and appearance of drinking water. Public Health Goat (PHG)r The level of a contaminant in have been found in the water system on multiple occasions.
Maximum Contaminant Level Goal (MCLG): The level of a drinking water below which there is no known or expected NA: Contaminant or property was not analyzed.
contaminant in drinkingwater belowwhich there is no known or risk to health. PHGs are set by the California Environmental ND: Contaminant was not detected. The contaminant is less
expected risk to health. MCLGs are set bythe U.S. EPA. Protection Agency. than the DLR.
Detection Limits for Purposes of Reporting (DLR): Regulatory Action Level: (AL): The concentration of a NTU: Nephelometric Turbidity Units
The DLR is a parameter that is set by regulation by each contaminant which, if exceeded, triggers treatment or other Units of Measurement: ---
reportable analyte. It is not laboratory specific and it requirements that awatersystemmustfollow.
is independent of the analytical method used (in cases ppm: parts per million
where several methods are approved). It is expected that Level 1 Assessment: A Level 1 Assessment is a study of a ppbrparts per billion
laboratory can achieve a Reporting Limit that is lower than water system to identify potential problems and determine (if pCi(L: picocuries per Inter
or equal to the DLR set by the State. This is also known as the possible) why total coliform bacteria have been found in the
Minimum Reporting Level (MRL). water system. µS/cm: micro Siemens per centimeter -
percent
Footnotes r
i. The State .allows us to monitor for some 4. Data from City of Downey Wells were collected;,
t
contaminants less than once per year because in 2019 and 2020 for Unregulated Chemical
the concentrations of these contaminants do Monitoring Rule 4. Unregulated contaminant
a
not change frequently. In these cases the most monitoring helps USEPA and the State Water
recent data available is used. Resources Control Board to determine where
2. There are no PHGs, MCLGs, or mandator certain contaminants occur and whether the
Y contammants need to be regulated.
health effects language for these constituents_
because secondary MCLs are set on the basis of 5. Data from City of Downey Wells were collected
aesthetics. in 2019 and 2020 for PFOS/PFOA. PFOS/PFOA
monitoring helps USEPA and the State Water
3. Lead and Copper testing results are based on Resources Control Board to determine where
triennial monitoring within residential taps. certain contaminants occur and whether the
Results are based on 2020 monitoring contaminants need to be regulated.
Important Information
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 informacion
muy importante sobre su agua para
beber. Favor de comunicarse con City of
Downey Water System at numero 562-
904-7202 para asistirlo en espanol.
Ana pag-uulat na ito ay naglataman ng
ma-halagang impormasyontungkol
sa inyong inumingtubig. Mangyaring
makipag-ugnayan sa City of Downey
Water System o tumawag sa 562-904-7202
ara matu(ungansawikangTagalog.
s L -1.- -�O-- to } h1 114 City of Downey
Prevent PoRution
Polluted runoff flows to storm drains directly into our rivers, bays, beaches and
the ocean. Contaminated runoff can pollute our beaches, and also harm fish
and wildlife. As a community it is important to prevent chemicals, automobile
fluid, and trash from entering our storm drains:
Source Water Assessment
iy
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, drywells, sumps, finishing, fabricating, metal plating, fleettruck,
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 State WaterResources Control Board (SWRCB), Division of
Drinking Water (DDW) at (818) 551-2004 or by calling the City of Downey Utilities
Division at (562) 904-7202.
TOILET HAS A LEAK Ouick Methodto Detect ToRet Leaks
(Blue water in bawl)
Toilet leaks may easy to repair, but detecting them can be a challenge. Here is a very quick
TOILET IS FINE and easy method to help you detect a toilet leak.
3 (Clear water in bowl) ,
1: Take off the tank lid.
2: Add 10 drops of food coloring liquid or a commercially available blue leak detector
r tablet into tank.
3: Wait15 to 20 minutes (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 ,
SNtEFR HAND
A water meter is a device that measures the volume of water delivered to a property. FLOW INDICATOR ;f • T ,� t
fftKm 8ij
Checking the water meter can help you determine if there is a water leak. g�
ER
(Note: Make sure no water is being used inside or outside your home while performing this test). REQ51
1: Locate your water meter box and carefully remove the lid. (Be cautious of insects or other small animals).
s�
2: Check your water meter to see if the flow indicator or sweep hand is moving:.
3: ' A moving leak indicator or sweep hand shows that water is either being used or wasted.
4: Be sure to securely reattach the meter lid to prevent trip hazards.
5 If leak is detected, repair leak within 48 hours. �s
of Downey 2021 Distribution System Water Data 3
GLossary of Tiarms/Abbreviations
Maximum Contaminant Level (MCL): The highest level of a contaminant
Primary Drinking Water Standard (PDWSh MCLs and NIRCLs for
Level 2 Assessment: A Level 2 Assessment is a detailed study of a water
that is allowed in drinking water. Primary MCLs are set as close to the PHGs
contaminant, that affect health along with their monitoring and reporting
system to identify potential problems and determine (if facialmor why an
(or MCLG,; as is economically sand technologically feasible, Secondary MCLs
requierneors, and water treatment requinereents.
EschericroacolO (E. call) MCL violation bar, occurred cadjorchytistal cialifinn
SMCLs) are satin protectool taste, and appearance of drinking water,
bacteria fraveberinfound in the water system on multiple occasions,
Public Health Goal NpHG); The level of a contaminant in drinking water
Maximum Contaminant Level Goal (MCLG): The level of a contaminant in
below which there is no known orexpected risk to health. PHGs are set bythe
NA: Contaminant or property poisnotinalyzed.
drinking water below which there:is no known or expected risk to health. MCLG5
California Environmental Protection AgeriCsic
ND; Crinuiruiroint was not detected. I lie contaminant is less than the DI-R,
are set by the U S, FPA
Detection Limits for Purposes of Reporting (DLFN: The DL R is a parameter
Regulatory Action Leveh (At): I he conrcodurt on of a contaminantvahwh, if
NTU: torphritarletric T.,bd,ts, Unit,
that is set by regulation by each reportable arrahste. it is not laboratory
exceeded, trigger, treatment or other requirements that a water system must
Units offileasurement,
specific and it is independent of the analytical method used (in cases where
hitless,
pia[ parts per orclicir
several methods arc, approved). It is expected that a laboratory can achieve a
Level) Assessment: A Level I Assessment is a study of a water system to
pplu part, per billion
Reporting Limit that is lowerthan or equalto the DLR set by:the State. This is
identify potential problems and determine. (if possible) why total colimun
a Is. known Is tire Minor— Rcp.,ting Level (cIRL).
bacteare have been found in the water system.
ppt: parts per trillion
'Corstyliates.,
pCi/L: picocurres per liter
1. The State allows of, to munrairfor some contorninams less than once per
potential pathway exists through which contamination may enter the
VS/erns miens Siemens or,, 'ent"n"hi,
year because the concentrations of these contaminants do not change
drinking water distribution system We found odforms indicating the
W percent
frequently In there rates the most recent data available is iixrd:
need to look for potential problems in our water distribution system,
1 There are no PHGv, MCI -Gs, or mandatory health effects language for
When this occured, we were required to conducts eve[ I assessment to
these constituents because secondary MCLs are set on the basis of
identify problems and to correct any problems that were found during
,iwth"fire.
the assessment , During the year 2021 we wilur required to conduct
one Level) Assessment. One Level I assessment was completed in
3,Thc, Consumer Confidence Report fCCR) reflects changes in drinking
November 2021 In addition, we were required to take Hall corrective
water regulatory requirements during 2021. These revisions add the
actions and we completed the two required action,.
requirements of the federal Revised Total Collision Rule, effective
5 Lead and Copper testing results are based oil triennial monitoring
since April 1, 2016, to the existing state Total Coliforrin Rule. The revised
within residential taps. Results are based on 2020 monitoring.
rule maintains the purpose to protect public health by ensuring the
integrity of the drinking water distribution system and monitoring for
6Data from City of Downey Winds were, collected from Jan. 1, 2018 to
the presence of micolluals ((,e., total coliforim and E call bacteria)
Dec 31, 2020 for Unregulated Chemical Monitoring Rule 4. Unregulated
The U.S. EPA anticipate, greater public health protection as the rule
contarmn,int monitoring help. USEPA and the State Water Resources
rectaircur water systems that are voincriable to microbial contamination
Control Board to determine where certain contaminants occur and
to identify and fix problems. Water systems that exceed a specified
whether the contaminants need to be regulated,
frequency of total coliform occurrences are required to conduct an
7.Folir Quarter, of data were collected front the City of Downeys' water
assessment Ito determine if any sanitary defecia, exist. If found, these
wells in 2021 for PFOSIPFOA. PFOSIPFOA monitoring helps USEPA and
must be corrected by the water system, lhcstate Rev sad Total coliforni
the State Water Resources Control Board (SWRCB) to determine where
Rule became'effective July 1, 2021,
certain contaminant, occur and whether the contaminants need to be
I lii N I
4.During the month of November 2021 , bacteriological quality of water
regulated, In August 2019, the SVsRC8 Division of Drinking Water dDD%W
A
served did not meet the requirements of the , Total Coliform Rule,
revised the notification levels to 6,5 parts per trillion qapt) for PFOS and
Coifform bacteria were detected in small portions of the distribution
5,1 plat for PFOA, The single health advisory eve[ (for the combined
system. Repeat samples eventually determined that the warterwas total
values of PFOS and PFOAJ rarranned at 70 put On February 6, 2020, DDVI
cohlarr, free, Appropriate public notificationwar,pneaded atthatime,
ssued updated drinking —ter response levels of 10 opt for PF0i 40
in comptionicerefth regulations, Colifty-5iintbacteria that are naturally
opt for PFOS based on a running four -quarter average. In July of 2021,
E
p relent in the environment and ate used as cir indicator that other'
HENNA released proposed Public Health Goals (PHGS) for PFCA and
potentially Harmful, warterborne pathogens may be present or that a
PFOS in drinking water of 0.007 ffrpt) and) opt respectively.
Important In -formation
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 informacion
muy"importante sobre su agua para
beber. Favor de comunicarse con City of
Downey Water System al numero 562
904-7202 para asistirlo en espanol
Ang pag-uulat na ito ay naglalaman ng
ma-halagang impormasyon tungkol
sa inyong inuming tubig. Mangyaring
makipag-ugnayan sa City of Downey
Water System o tumawag sa 562-904-7202
para matulungan sa wikang Tagalog.
Lr bt� 1�' y31-t} 0,1.- 1-1r1 l-gol
s ul L °- to 4 &1 111 City of Downey
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