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EWG's Tap Water Database — 2021 UPDATE

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Sierra Army Depot

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

  • Lassen County, California
  • Serves: 1,500
  • Data available: 2014-2019
  • Source: Groundwater

Contaminants Detected

10

EXCEED
EWG HEALTH
GUIDELINES

16 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.

Legal ≠ Safe

EWG Health Guidelines fill the gap in outdated government standards.

The federal government’s legal limits are not health-protective. The EPA has not set a new tap water standard in almost 20 years, and some standards are more than 40 years old.

Contaminants Detected

1,2,3-Trichloropropane

Potential Effect: cancer38x EWG'S HEALTH GUIDELINE
THIS UTILITY0.0267 ppb
EWG HEALTH GUIDELINE0.0007 ppb
NO LEGAL LIMIT
DETAILS
X

1,2,3-Trichloropropane

more about
this contaminant

1,2,3-Trichloropropane is a potent carcinogen that contaminates drinking water in agricultural regions where it was historically used as soil fumigant. Click here to read more about carcinogenic VOCs.

1,2,3-Trichloropropane was found at 38 times above EWG's Health Guideline.

EWG Health Guideline

0.0007 ppb or less

This Utility

0.0267 ppb

National Average

0.00041 ppb

State Average

0.000697 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 0.0007 ppb for 1,2,3-trichloropropane 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

Filtering Options

carbon filter icon

Activated Carbon

reverse osmosis icon

Reverse Osmosis

Arsenic

Potential Effect: cancer917x EWG'S HEALTH GUIDELINE
THIS UTILITY3.67 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 917 times above EWG's Health Guideline.

EWG Health Guideline

0.004 ppb or less

This Utility

3.67 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

Chromium (hexavalent)

Potential Effect: cancer15x EWG'S HEALTH GUIDELINE
THIS UTILITY0.300 ppb
EWG HEALTH GUIDELINE0.02 ppb
NO LEGAL LIMIT
DETAILS
X

Chromium (hexavalent)

more about
this contaminant

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

Chromium (hexavalent) was found at 15 times above EWG's Health Guideline.

EWG Health Guideline

0.02 ppb or less

This Utility

0.3 ppb

National Average

0.484 ppb

State Average

1.36 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 0.02 ppb for chromium (hexavalent) 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

naturally occuring icon

Naturally Occurring

Filtering Options

reverse osmosis icon

Reverse Osmosis

ion exchange icon

Ion Exchange

Manganese

Potential Effect: harm to the brain and nervous system2.1x EWG'S HEALTH GUIDELINE
THIS UTILITY207.6 ppb
EWG HEALTH GUIDELINE100 ppb
NO LEGAL LIMIT
DETAILS
X

Manganese is a naturally occurring element that is common in food and drinking water. Excessive manganese exposures may impair children's attention, memory and intellectual capacity. Click here to read more about manganese.

Manganese was found at 2.1 times above EWG's Health Guideline.

EWG Health Guideline

100 ppb or less

This Utility

207.6 ppb

National Average

10.1 ppb

State Average

6.42 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 100 ppb for manganese was defined by the state of Minnesota as a health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the brain and nervous system.

Pollution Sources

industry icon

Industry

naturally occuring icon

Naturally Occurring

Filtering Options

ion exchange icon

Ion Exchange

Nitrate

Potential Effect: cancer21x EWG'S HEALTH GUIDELINE
THIS UTILITY2.99 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 21 times above EWG's Health Guideline.

EWG Health Guideline

0.14 ppm or less

This Utility

2.99 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

Perfluoroheptanoic acid (PFHPA)

Potential Effect: 5.4x EWG'S HEALTH GUIDELINE
THIS UTILITY5.44 ppt
EWG HEALTH GUIDELINE1 ppt
NO LEGAL LIMIT
DETAILS
X

Perfluoroheptanoic acid (PFHPA)

more about
this contaminant

Perfluoroheptanoic acid is a member of a group of perfluorinated chemicals used in many consumer products. Perfluorinated chemicals can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes. These chemicals are persistent in the environment and they accumulate in people. Click here to read more about perfluorinated chemicals.

Perfluoroheptanoic acid (PFHPA) was found at 5.4 times above EWG's Health Guideline.

EWG Health Guideline

1 ppt or less

This Utility

5.44 ppt

National Average

0.215 ppt

State Average

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

Health Risks

The EWG Health Guideline of 1 ppt for perfluoroheptanoic acid was defined by EWG based on studies by Phillipe Grandjean of Harvard University and many other independent researchers who found reduced effectiveness of vaccines and adverse impacts on mammary gland development from exposure to PFOA and PFOS, the two PFAS most widely detected in drinking water. This health guideline applies to the entire class of PFAS detected in water.

Pollution Sources

industry icon

Industry

urban area icon

Runoff & Sprawl

Filtering Options

carbon filter icon

Activated Carbon

reverse osmosis icon

Reverse Osmosis

Perfluorohexane sulfonate (PFHXS)

Potential Effect: 22x EWG'S HEALTH GUIDELINE
THIS UTILITY21.5 ppt
EWG HEALTH GUIDELINE1 ppt
NO LEGAL LIMIT
DETAILS
X

Perfluorohexane sulfonate (PFHXS)

more about
this contaminant

Perfluorohexane sulfonate is a member of a group of perfluorinated chemicals used in many consumer products. Perfluorinated chemicals can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes. These chemicals are persistent in the environment and they accumulate in people. Click here to read more about perfluorinated chemicals.

Perfluorohexane sulfonate (PFHXS) was found at 22 times above EWG's Health Guideline.

EWG Health Guideline

1 ppt or less

This Utility

21.5 ppt

National Average

0.361 ppt

State Average

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

Health Risks

The EWG Health Guideline of 1 ppt for perfluorohexane sulfonate was defined by EWG based on studies by Phillipe Grandjean of Harvard University and many other independent researchers who found reduced effectiveness of vaccines and adverse impacts on mammary gland development from exposure to PFOA and PFOS, the two PFAS most widely detected in drinking water. This health guideline applies to the entire class of PFAS detected in water.

Pollution Sources

industry icon

Industry

urban area icon

Runoff & Sprawl

Filtering Options

carbon filter icon

Activated Carbon

reverse osmosis icon

Reverse Osmosis

Perfluorooctanoic acid (PFOA)

Potential Effect: cancer6,161x EWG'S HEALTH GUIDELINE
THIS UTILITY43.1 ppt
EWG HEALTH GUIDELINE0.007 ppt
NO LEGAL LIMIT
DETAILS
X

Perfluorooctanoic acid (PFOA)

more about
this contaminant

Perfluorooctanoic acid (PFOA) is a member of a group of perfluorinated chemicals used in many consumer products. PFOA and other perfluorinated chemicals can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes. These chemicals are persistent in the environment and they accumulate in people. Click here to read more about perfluorinated chemicals.

Perfluorooctanoic acid (PFOA) was found at 6,161 times above EWG's Health Guideline.

EWG Health Guideline

0.007 ppt or less

This Utility

43.1 ppt

National Average

1.15 ppt

State Average

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

Health Risks

The EWG Health Guideline of 0.007 ppt for PFOA was proposed by 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

Radium, combined (-226 & -228)

Potential Effect: cancer12x EWG'S HEALTH GUIDELINE
THIS UTILITY0.62 pCi/L
EWG HEALTH GUIDELINE0.05 pCi/L
LEGAL LIMIT5 pCi/L
DETAILS
X

Radium, combined (-226 & -228)

more about
this contaminant

Radium is a radioactive element that causes bone cancer and other cancers. It can occur naturally in groundwater, and oil and gas extraction activities such as hydraulic fracturing can elevate concentrations.

Radium, combined (-226 & -228) was found at 12 times above EWG's Health Guideline.

EWG Health Guideline

0.05 pCi/L or less

This Utility

0.62 pCi/L

Legal Limit

5 pCi/L

National Average

0.46 pCi/L

State Average

0.12 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

EWG applied the health guideline of 0.05 pCi/L, defined by the California Office of Environmental Health Hazard Assessment as a public health goal for radium-226, to radium-226 and radium-228 combined. 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

Uranium

Potential Effect: cancer31x EWG'S HEALTH GUIDELINE
THIS UTILITY13.50 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 31 times above EWG's Health Guideline.

EWG Health Guideline

0.43 pCi/L or less

This Utility

13.5 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.


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 , 1,2,4-Trichlorobenzene , 1,2,4-Trimethylbenzene , 1,2-Dibromo-3-chloropropane (DBCP) , 1,2-Dichloroethane , 1,2-Dichloropropane , 1,3,5-Trimethylbenzene , 1,3-Dichloropropane , 1,3-Dichloropropene , 1,4-Dioxane , 2,2-Dichloropropane , 2,4,5-T , 2,4,5-TP (Silvex) , 2,4-D , 3-Hydroxycarbofuran , Acetone , Alachlor (Lasso) , Aldicarb , Aldicarb sulfone , Aldicarb sulfoxide , Aldrin , Aluminum , Antimony , Atrazine , Bentazon (Basagran) , Benzene , Benzo[a]pyrene , Beryllium , Bromacil , Bromobenzene , Bromochloromethane , Bromodichloromethane , Bromoform , Bromomethane , Butachlor , Cadmium , Carbaryl , Carbofuran , Carbon tetrachloride , Chlordane , Chloroethane , Chloroform , Chloromethane , cis-1,2-Dichloroethylene , cis-1,3-Dichloropropene , Cyanide , Dalapon , Di(2-ethylhexyl) adipate , Di(2-ethylhexyl) phthalate , Diazinon (Spectracide) , Dibromochloromethane , Dibromomethane , Dicamba , Dichlorodifluoromethane , Dichloromethane (methylene chloride) , Dieldrin , Dimethoate , Dinoseb , Diquat , Endothall , Endrin , Ethyl tert-butyl ether , Ethylbenzene , Ethylene dibromide , Glyphosate , Heptachlor , Heptachlor epoxide , Hexachlorobenzene (HCB) , Hexachlorobutadiene , Hexachlorocyclopentadiene , Isopropyl ether , Isopropylbenzene , Lindane , m-Dichlorobenzene , Mercury (inorganic) , Methomyl , Methoxychlor , Methyl ethyl ketone , Methyl isobutyl ketone , Metolachlor , Metribuzin , Molinate , Monochlorobenzene (chlorobenzene) , MTBE , n-Butylbenzene , n-Propylbenzene , Naphthalene , o-Chlorotoluene , o-Dichlorobenzene , Oxamyl (Vydate) , p-Chlorotoluene , p-Dichlorobenzene , p-Isopropyltoluene , Pentachlorophenol , Perchlorate , Perfluorononanoic acid (PFNA) , Perfluorooctane sulfonate (PFOS) , Picloram , Polychlorinated biphenyls (PCBs) , Propachlor , sec-Butylbenzene , Selenium , Silver , Simazine , Styrene , tert-Amyl methyl ether , tert-Butyl alcohol , tert-Butylbenzene , Tetrachloroethylene (perchloroethylene) , Thallium , Thiobencarb , Total trihalomethanes (TTHMs) , Toxaphene , trans-1,2-Dichloroethylene , trans-1,3-Dichloropropene , Trichloroethylene , Trichlorofluoromethane , Trichlorotrifluoroethane , Vinyl chloride , Xylenes (total)

Sierra Army Depot compliance with legally mandated federal standards:

  • From April 2019 to March 2021, Sierra Army Depot complied with health-based drinking water standards.

Information in this section on Sierra Army Depot 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
1,2,3-Trichloropropane
Arsenic
Chromium (hexavalent)
Manganese
Nitrate
Perfluoroheptanoic acid (PFHPA)
Perfluorohexane sulfonate (PFHXS)
Perfluorooctanoic acid (PFOA)
Radium, combined (-226 & -228)
Uranium, combined (pCi/L)
OTHER CONTAMINANTS
DETECTED
Barium
Chromium (total)
Fluoride
Nitrite
Perfluorobutane sulfonate (PFBS)
Toluene

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