The Power of Information

National Drinking Water Database


Tritium in California


Tritium is a pollutant from commercial nuclear reactors, research reactors and government weapons production plants.

The Most Polluted Communities in California

37 water utilities reported detecting Tritium in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Tritium level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1South Tahoe Pud - Main
South Lake Tahoe, CA
60,0001 of 11393 pCi/L
(1393 pCi/L)
2Reynolds Resorts - Sacramento Llc
West Sacramento, CA
3001 of 1480 pCi/L
(480 pCi/L)
3West Kern Cwd
Taft, CA
16,8003 of 3212.1 pCi/L
(98.59 to 328.63 pCi/L)
4Hidden Valley Lake Csd
Hidden Valley Lake, CA
6,7571 of 1195 pCi/L
(195 pCi/L)
5Elsinore Valley Mwd - Temescal
Lake Elsinore, CA
3,0103 of 3177.82 pCi/L
(55.06 to 386 pCi/L)
6Riverview Wd
Lakeside, CA
16,0001 of 1167.03 pCi/L
(167.03 pCi/L)
7City of San Juan Capistrano
San Juan Capistrano, CA
33,8001 of 1164 pCi/L
(164 pCi/L)
8Pomona - City, Water Dept.
Pomona, CA
156,50059 of 68160.9 pCi/L
(0 to 627.67 pCi/L)
9Elsinore Valley Mwd
Lake Elsinore, CA
81,10112 of 12150.93 pCi/L
(5.68 to 460 pCi/L)
10City of Daly City
Daly City, CA
92,3111 of 1134.36 pCi/L
(134.36 pCi/L)

Health Based Limits for Tritium

There are no health based standards that EWG is using for this chemical

Violation Summary for Tritium in California

There are no violations reported for this contaminant in California