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EWG's Tap Water Database — 2021 UPDATE

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Tritium

Status: No national drinking water standard exists

 

Tritium is a radioactive element emitted from nuclear reactors and weapons production plants. Radiation from tritium and other radioactive substances increases the risk of cancer. Click here to read more on radiological contaminants.

2014-2019:

FOUND
FOUND ABOVE HEALTH GUIDELINES

8

states detected

201

utilities detected

12 million

people served

4

states over health guideline

8

utilities over health guideline

167,000

people served over health guideline

Health concerns for tritium

Cancer

State and national drinking water standards and health guidelines

EWG Health Guideline 400 pCi/L

The EWG Health Guideline of 400 pCi/L for tritium 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.

pCi/L = picocuries per liter

States reporting tritium in drinking water

UTILITIES REPORTING ABOVE HEALTH GUIDELINES UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served UtilitiesPeople Served
California4123,54014110,685,722
Arkansas0031909,534
Pennsylvania137,000789,410
New Mexico00487,937
Connecticut1601149,463
Illinois26,62526,625
Oklahoma0035,378
Virginia002280
MORE
LESS

Utilities with the highest amounts of tritium, 2014-2019

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Woodland-davis Clean Water AgencyDavis, CA4 of 102,593.60 pCi/L0
City of OakdaleOakdale, CA1 of 1922.00 pCi/L19,250
Lamont Public Utility DistrictBakersfield, CA1 of 1776.00 pCi/L18,290
Ventura Waterworks District No. 8 - Simi ValleySimi Valley, CA1 of 4636.25 pCi/L86,000
Wilmington*Wilmington, IL207 of 292602.22 pCi/L5,757
Lakewood Shores Improvement AssociationWilmington, IL207 of 292602.22 pCi/L868
Conrads ParkDanielson, CT2 of 3586.00 pCi/L60
Penn State Univ.*University Park, PA2 of 4497.85 pCi/L37,000
East Orange County Water District - Wz*Orange, CA7 of 19296.11 pCi/L0
El Toro Water DistrictLake Forest, CA7 of 19296.11 pCi/L48,628
Western Municipal Water District (id A - Rainbow)Riverside, CA7 of 19296.11 pCi/L122
Laguna Beach County WDLaguna Beach, CA7 of 19296.11 pCi/L50,000
Beverly Hills Water DepartmentBeverly Hills, CA7 of 19296.11 pCi/L44,290
California Water Service Company - Palos VerdeSan Jose, CA7 of 19296.11 pCi/L69,883
Metropolitan Water District of So. Cal.*Los Angeles, CA7 of 19296.11 pCi/L0
Foothill Municipal Water District*La Canada Flintridge, CA7 of 19296.11 pCi/L0
Golden State Water Company (GSWC) - Culver CityRancho Cordova, CA7 of 19296.11 pCi/L36,215
El Segundo Water DepartmentEl Segundo, CA7 of 19296.11 pCi/L16,654
City of Seal BeachSeal Beach, CA1 of 1295.00 pCi/L24,157
Chowchilla City Water DepartmentChowchilla, CA1 of 1220.00 pCi/L11,759
U.s. Coast Guard Training CenterPetaluma, CA1 of 2194.50 pCi/L1,350
City of Petaluma*Petaluma, CA1 of 2194.50 pCi/L55,900
Woodside Rv ParkFort Bragg, CA1 of 2192.50 pCi/L280
Connecticut Water Company - Shoreline Region-chester System*Clinton, CT1 of 2172.00 pCi/L5,030
Ventura County Waterworks District No. 17 - Bell CanyonMoorpark, CA14 of 118157.19 pCi/L2,049
Lake Sherwood Community Services DistrictMoorpark, CA14 of 118157.19 pCi/L1,527
Solano Verde Mutual Water CompanyCamarillo, CA14 of 118157.19 pCi/L100
California Water Service Company - WestlakeSan Jose, CA14 of 118157.19 pCi/L19,451
Thousand Oaks Water DepartmentThousand Oaks, CA14 of 118157.19 pCi/L50,000
Calleguas Municipal Water District*Thousand Oaks, CA14 of 118157.19 pCi/L0
Cal American Water CompanyNewbury Park, CA14 of 118157.19 pCi/L61,206
Oak Park Water ServiceVentura, CA14 of 118157.19 pCi/L12,200
Cal American Water Company - Las Posas EstatesNewbury Park, CA14 of 118157.19 pCi/L1,800
Fox Laurel Mobile Home Park LLCOakdale, CT2 of 4122.50 pCi/L40
Dardanelle*Dardanelle, AR2 of 9116.11 pCi/L4,228
Fcmtc WaterworksFort Chaffee, AR4 of 18115.89 pCi/L500
Franklin-Sebatian Public Water Authority*Lavaca, AR4 of 18115.89 pCi/L0
Chester Water*Chester, AR4 of 18115.89 pCi/L205
ArkomaArkoma, OK4 of 18115.89 pCi/L2,180
Sequoyah County Rural Water District #7Muldrow, OK4 of 18115.89 pCi/L2,948
Lee Creek Rural Water DistrictMuldrow, OK4 of 18115.89 pCi/L250
CedarvilleCedarville, AR4 of 18115.89 pCi/L8,423
Van Buren Waterworks*Van Buren, AR4 of 18115.89 pCi/L22,725
Highway 71 Water District #1 Public Water Authority*Alma, AR4 of 18115.89 pCi/L6,250
Concord Water & Sewer Pfb of Crawford CountyVan Bure, AR4 of 18115.89 pCi/L3,020
Winslow WaterworksWinslow, AR4 of 18115.89 pCi/L1,590
Fort Smith Water Utilities*Fort Smith, AR4 of 18115.89 pCi/L86,209
Barling Waterworks*Barling, AR4 of 18115.89 pCi/L4,583
Bentonville Water Utilities*Bentonville, AR2 of 9115.67 pCi/L42,343
Springdale Water Utilities*Springdale, AR2 of 9115.67 pCi/L90,235

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Tritium, but it likely has the contaminant in its water supply.

UtilityLocationTestsAverage levelPeople served
City of OakdaleOakdale, CA1 of 1922.00 pCi/L19,250
Lamont Public Utility DistrictBakersfield, CA1 of 1776.00 pCi/L18,290
Ventura Waterworks District No. 8 - Simi ValleySimi Valley, CA1 of 4636.25 pCi/L86,000
Penn State Univ.*University Park, PA2 of 4497.85 pCi/L37,000
California Water Service Company - Palos VerdeSan Jose, CA7 of 19296.11 pCi/L69,883
El Toro Water DistrictLake Forest, CA7 of 19296.11 pCi/L48,628
Laguna Beach County WDLaguna Beach, CA7 of 19296.11 pCi/L50,000
Beverly Hills Water DepartmentBeverly Hills, CA7 of 19296.11 pCi/L44,290
El Segundo Water DepartmentEl Segundo, CA7 of 19296.11 pCi/L16,654
Golden State Water Company (GSWC) - Culver CityRancho Cordova, CA7 of 19296.11 pCi/L36,215
City of Seal BeachSeal Beach, CA1 of 1295.00 pCi/L24,157
Chowchilla City Water DepartmentChowchilla, CA1 of 1220.00 pCi/L11,759
City of Petaluma*Petaluma, CA1 of 2194.50 pCi/L55,900
Cal American Water CompanyNewbury Park, CA14 of 118157.19 pCi/L61,206
Oak Park Water ServiceVentura, CA14 of 118157.19 pCi/L12,200
Thousand Oaks Water DepartmentThousand Oaks, CA14 of 118157.19 pCi/L50,000
California Water Service Company - WestlakeSan Jose, CA14 of 118157.19 pCi/L19,451
Fort Smith Water Utilities*Fort Smith, AR4 of 18115.89 pCi/L86,209
Van Buren Waterworks*Van Buren, AR4 of 18115.89 pCi/L22,725
Rogers Water Utilities*Rogers, AR2 of 9115.67 pCi/L70,878
Springdale Water Utilities*Springdale, AR2 of 9115.67 pCi/L90,235
Fayetteville Waterworks*Fayetteville, AR2 of 9115.67 pCi/L102,878
Bentonville Water Utilities*Bentonville, AR2 of 9115.67 pCi/L42,343
Central Arkansas Water*Little Rock, AR3 of 1887.50 pCi/L330,667
Ramona Municipal WDRamona, CA1 of 741.29 pCi/L40,000
Valley Center MWD*Valley Center, CA1 of 741.29 pCi/L25,450
Rincon Del Diablo MWD(ID-1)Escondido, CA1 of 741.29 pCi/L24,545
Rainbow Municipal WDFallbrook, CA1 of 741.29 pCi/L19,611
City of CarlsbadCarlsbad, CA1 of 741.29 pCi/L84,838
Vallecitos Water DistrictSan Marcos, CA1 of 741.29 pCi/L94,871
Pennsylvania American RoyersfordSpring City, PA2 of 93.51 pCi/L41,613
Southington Water DepartmentSouthington, CT1 of 40.72 pCi/L43,069

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Tritium, but it likely has the contaminant in its water supply.