Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Lynwood Park Mutual Water Company

EWG's drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group by the California State Water Resources Control Board, as well as information from the U.S. EPA Enforcement and Compliance History database (ECHO). For the latest quarter assessed by the U.S. EPA (January 2021 - March 2021), tap water provided by this water utility was in compliance with federal health-based drinking water standards.

Utility Details

  • Los Angeles County, California
  • Serves: 2,300
  • Data available: 2014-2019
  • Source: Groundwater

Contaminants Detected

7

EXCEED
EWG HEALTH
GUIDELINES

24 Total Contaminants

  • Legal does not necessarily equal safe. Getting a passing grade from the federal government does not mean the water meets the latest health guidelines.
  • Legal limits for contaminants in tap water have not been updated in almost 20 years.
  • The best way to ensure clean tap water is to keep pollution out of source water in the first place.

Looking for a countertop water filter?

Find out which filters earned EWG's recommendation

See the guide

Contaminants Detected

1,4-Dioxane

Potential Effect: cancer9.7x EWG'S HEALTH GUIDELINE
THIS UTILITY3.39 ppb
EWG HEALTH GUIDELINE0.35 ppb
NO LEGAL LIMIT
DETAILS
X

1,4-Dioxane is a solvent classified by the EPA as a likely human carcinogen. It contaminates groundwater in many states due to industrial wastewater discharges, plastic manufacturing runoff and landfill runoff.

1,4-Dioxane was found at 9.7 times above EWG's Health Guideline.

EWG Health Guideline

0.35 ppb or less

This Utility

3.39 ppb

National Average

0.0681 ppb

State Average

0.142 ppb
NO LEGAL LIMIT
The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2013-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.35 ppb for 1,4-dioxane was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

Pollution Sources

industry icon

Industry

urban area icon

Runoff & Sprawl

Filtering Options

reverse osmosis icon

Reverse Osmosis

Arsenic

Potential Effect: cancer358x EWG'S HEALTH GUIDELINE
THIS UTILITY1.43 ppb
EWG HEALTH GUIDELINE0.004 ppb
LEGAL LIMIT10 ppb
DETAILS
X

Arsenic is a potent carcinogen and common contaminant in drinking water. Arsenic causes thousands of cases of cancer each year in the U.S. Click here to read more about arsenic.

Arsenic was found at 358 times above EWG's Health Guideline.

EWG Health Guideline

0.004 ppb or less

This Utility

1.43 ppb

Legal Limit

10 ppb

National Average

0.647 ppb

State Average

1.1 ppb
The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.004 ppb for arsenic was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

Pollution Sources

agriculture icon

Agriculture

industry icon

Industry

naturally occuring icon

Naturally Occurring

Filtering Options

reverse osmosis icon

Reverse Osmosis

ion exchange icon

Ion Exchange

Bromodichloromethane

Potential Effect: cancer2.9x EWG'S HEALTH GUIDELINE
THIS UTILITY0.176 ppb
EWG HEALTH GUIDELINE0.06 ppb
NO LEGAL LIMIT
DETAILS
X

Bromodichloromethane

more about
this contaminant

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

Bromodichloromethane was found at 2.9 times above EWG's Health Guideline.

EWG Health Guideline

0.06 ppb or less

This Utility

0.176 ppb

National Average

5.79 ppb

State Average

4.33 ppb
NO LEGAL LIMIT
The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.06 ppb for bromodichloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

Pollution Sources

water treatment icon

Treatment Byproducts

Filtering Options

carbon filter icon

Activated Carbon

reverse osmosis icon

Reverse Osmosis

Nitrate

Potential Effect: cancer10x EWG'S HEALTH GUIDELINE
THIS UTILITY1.44 ppm
EWG HEALTH GUIDELINE0.14 ppm
LEGAL LIMIT10 ppm
DETAILS
X

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

Nitrate was found at 10 times above EWG's Health Guideline.

EWG Health Guideline

0.14 ppm or less

This Utility

1.44 ppm

Legal Limit

10 ppm

National Average

0.935 ppm

State Average

1.9 ppm
The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppm = parts per million

Health Risks

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

Pollution Sources

agriculture icon

Agriculture

urban area icon

Runoff & Sprawl

naturally occuring icon

Naturally Occurring

Filtering Options

reverse osmosis icon

Reverse Osmosis

ion exchange icon

Ion Exchange

Tetrachloroethylene (perchloroethylene)

Potential Effect: cancer66x EWG'S HEALTH GUIDELINE
THIS UTILITY3.93 ppb
EWG HEALTH GUIDELINE0.06 ppb
LEGAL LIMIT5 ppb
DETAILS
X

Tetrachloroethylene (perchloroethylene)

more about
this contaminant

Dry cleaning chemical tetrachloroethylene, or perc, can cause cancer. It pollutes soil and groundwater due to emissions from dry cleaning facilities, and automotive, metalworking and other industries.

Tetrachloroethylene (perchloroethylene) was found at 66 times above EWG's Health Guideline.

EWG Health Guideline

0.06 ppb or less

This Utility

3.93 ppb

Legal Limit

5 ppb

National Average

0.0211 ppb

State Average

0.0723 ppb
The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The EWG Health Guideline of 0.06 ppb for tetrachloroethylene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

Pollution Sources

industry icon

Industry

urban area icon

Runoff & Sprawl

Filtering Options

carbon filter icon

Activated Carbon

reverse osmosis icon

Reverse Osmosis

Total trihalomethanes (TTHMs)†

Potential Effect: cancer5x EWG'S HEALTH GUIDELINE
THIS UTILITY0.754 ppb
EWG HEALTH GUIDELINE0.15 ppb
LEGAL LIMIT80 ppb
DETAILS
X

Total trihalomethanes (TTHMs)

more about
this contaminant

Trihalomethanes are cancer-causing contaminants that form during water treatment with chlorine and other disinfectants. The total trihalomethanes group includes four chemicals: chloroform, bromodichloromethane, dibromochloromethane and bromoform.

Total trihalomethanes (TTHMs) was found at 5 times above EWG's Health Guideline.

EWG Health Guideline

0.15 ppb or less

This Utility

0.754 ppb

Legal Limit

80 ppb

National Average

29.7 ppb

State Average

27.8 ppb
The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2017-2019.
ppb = parts per billion

Health Risks

The health guideline of 0.15 parts per billion, or ppb, for the group of four trihalomethanes, or THM4/TTHM, was defined in a peer-reviewed scientific study by EWG and represents a one-in-one-million lifetime cancer risk level.

Pollution Sources

water treatment icon

Treatment Byproducts

Filtering Options

carbon filter icon

Activated Carbon

reverse osmosis icon

Reverse Osmosis

Uranium

Potential Effect: cancer11x EWG'S HEALTH GUIDELINE
THIS UTILITY4.53 pCi/L
EWG HEALTH GUIDELINE0.43 pCi/L
LEGAL LIMIT20 pCi/L
DETAILS
X

Uranium is a known human carcinogen. The federal legal limit for uranium is set at 30 micrograms per liter (corresponding to parts per billion), but utilities can also report uranium in picocuries per liter (pCi/L), which is a measure of radioactivity in water. EWG translated all uranium results to pCi/L using a conversion factor developed by the EPA. With this conversion approach, the limit of 30 ppb corresponds to 20 pCi/L. Drinking water with this much uranium would cause more than 4.6 cancer cases in a population of 100,000. California set a public health goal for uranium of 0.43 pCi/L.

Uranium was found at 11 times above EWG's Health Guideline.

EWG Health Guideline

0.43 pCi/L or less

This Utility

4.53 pCi/L

Legal Limit

20 pCi/L

National Average

1.04 pCi/L

State Average

2.54 pCi/L
The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2014-2019.
pCi/L = picocuries per liter

Health Risks

The EWG Health Guideline of 0.43 pCi/L for uranium was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. Three most common uranium isotopes are U-234, U-235 and U-238. All isotopes of uranium are radioactive, and the total radioactivity depends on the ratio of isotopes. This health guideline protects against cancer.

Pollution Sources

industry icon

Industry

naturally occuring icon

Naturally Occurring

Filtering Options

reverse osmosis icon

Reverse Osmosis

ion exchange icon

Ion Exchange

Includes chemicals detected in 2017-2019 for which annual utility averages exceeded an EWG-selected health guideline established by a federal or state public health authority; chemicals detected under the EPA's Unregulated Contaminant Monitoring Rule (UCMR 3) program in 2013 to 2015 (and subsequent testing when available), for which annual utility averages exceeded a health guideline established by a federal or state public health authority; radiological contaminants detected between 2014 and 2019.

† HAA5 is a contaminant group that includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid. HAA9 is a contaminant group that includes the chemicals in HAA5 and bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid and tribromoacetic acid. TTHM is a contaminant group that includes bromodichloromethane, bromoform, chloroform and dibromochloromethane.


Other Contaminants Tested


Chemicals tested for but not detected from 2014 to 2019:

1,1,1,2-Tetrachloroethane , 1,1,1-Trichloroethane , 1,1,2,2-Tetrachloroethane , 1,1,2-Trichloroethane , 1,1-Dichloroethane , 1,1-Dichloroethylene , 1,1-Dichloropropene , 1,2,3-Trichlorobenzene , 1,2,3-Trichloropropane , 1,2,4-Trichlorobenzene , 1,2-Dichloroethane , 1,2-Dichloropropane , 1,3-Dichloropropane , 1,3-Dichloropropene , 2,2-Dichloropropane , 2-Chloroethylvinyl ether , Acetone , Alachlor (Lasso) , Aluminum , Antimony , Asbestos , Atrazine , Benzene , Benzo[a]pyrene , Beryllium , Bromacil , Bromobenzene , Bromochloromethane , Bromomethane , Butachlor , Cadmium , Captan , Carbon tetrachloride , Carbophenothion , Chloroethane , Chloromethane , Chlorpropham , Chromium (hexavalent) , Chromium (total) , cis-1,2-Dichloroethylene , cis-1,3-Dichloropropene , Cyanazine (Bladex) , Cyanide , Di(2-ethylhexyl) adipate , Di(2-ethylhexyl) phthalate , Diazinon (Spectracide) , Dibromomethane , Dichlorodifluoromethane , Dichloromethane (methylene chloride) , Dimethoate , Diphenamide , Disulfoton , EPTC (Eptam) , Ethyl tert-butyl ether , Hexachlorobutadiene , Isopropyl ether , m-Dichlorobenzene , Manganese , Mercury (inorganic) , Methyl ethyl ketone , Methyl isobutyl ketone , Metolachlor , Metribuzin , Molinate , Monobromoacetic acid , Monochloroacetic acid , Monochlorobenzene (chlorobenzene) , MTBE , n-Propylbenzene , Nitrite , o-Chlorotoluene , o-Dichlorobenzene , p-Chlorotoluene , p-Dichlorobenzene , Perchlorate , Prometon , Prometryn , Radium, combined (-226 & -228) , sec-Butylbenzene , Selenium , Silver , Simazine , Styrene , Terbacil , tert-Amyl methyl ether , tert-Butylbenzene , Thallium , Thiobencarb , Toluene , trans-1,2-Dichloroethylene , trans-1,3-Dichloropropene , Trichloroethylene , Trichlorofluoromethane , Trichlorotrifluoroethane , Vinyl chloride

Lynwood Park Mutual Water Company compliance with legally mandated federal standards:

  • From April 2019 to March 2021, Lynwood Park Mutual Water Company complied with health-based drinking water standards.
  • 5 QUARTERS
    in violation of any federal drinking water standard from April 2019 to March 2021

Information in this section on Lynwood Park Mutual Water Company comes from the U.S. EPA Enforcement and Compliance History Online database (ECHO).

LEARN MORE ABOUT THIS UTILITY

Water Filters That Can Reduce Contaminant Levels

ContaminantActivated Carbonactivated carbonReverse Osmosisreverse osmosisIon Exchangeion exchange
CONTAMINANTS ABOVE
HEALTH GUIDELINES
1,4-Dioxane
Arsenic
Bromodichloromethane
Nitrate
Tetrachloroethylene (perchloroethylene)
Total trihalomethanes (TTHMs)
Uranium, combined (pCi/L)
OTHER CONTAMINANTS
DETECTED
1,2,4-Trimethylbenzene
1,3,5-Trimethylbenzene
Barium
Bromoform
Chloroform
Dibromoacetic acid
Dibromochloromethane
Dichloroacetic acid
Ethylbenzene
Fluoride
Haloacetic acids (HAA5)
Isopropylbenzene
n-Butylbenzene
Naphthalene
p-Isopropyltoluene
Trichloroacetic acid
Xylenes (total)

Take Action

Contact Your Local Official

One of the best ways to push for cleaner water is to hold accountable the elected officials who have a say in water quality – from city hall and the state legislature to Congress all the way to the Oval Office – by asking questions and demanding answers.

LEARN MORE

Filter Out Contaminants

Check out our recommendations for filters to protect your water against the detected contaminants.

EWG’S WATER FILTER GUIDE