The Power of Information

National Drinking Water Database

Gross beta particle activity (pCi/L) in California

Beta particles are a form of radiation frequently associated with nuclear testing and radioactive mineral deposits. [read more]

The Most Polluted Communities in California

145 water utilities reported detecting Gross beta particle activity (pCi/L) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Gross beta particle activity (pCi/L) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Lake Morena Oak Shore MW Co.
Campo, CA
7003 of 313.59 pCi/L
(5.08 to 23.2 pCi/L)
2Fcwwd #40/Shaver Springs
Pineridge, CA
1282 of 212.97 pCi/L
(9.13 to 16.8 pCi/L)
3Torrance-City, Water Dept.
Torrance, CA
112,0081 of 110 pCi/L
(10 pCi/L)
4River Pines Pud
River Pines, CA
5004 of 48.2 pCi/L
(8.2 pCi/L)
5Lake Henshaw Resort Inc.
Santa Ysabel, CA
3001 of 18.15 pCi/L
(8.15 pCi/L)
6Sierra Army Depot
Herlong, CA
1,4218 of 87.95 pCi/L
(5.94 to 12.43 pCi/L)
7Rancho Mission Viejo
Mission Viejo, CA
773 of 47.88 pCi/L
(0 to 13 pCi/L)
8Rancho Del Campo Water System
Campo, CA
2901 of 17.8 pCi/L
(7.8 pCi/L)
9City of Watsonville
Watsonville, CA
62,0001 of 27.5 pCi/L
(0 to 15 pCi/L)
10Golden State WC - Yorba Linda
Placentia, CA
5,7426 of 67.5 pCi/L
(7.44 to 7.55 pCi/L)

Health Based Limits for Gross beta particle activity (pCi/L)

Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.15 pCi/L

Violation Summary for Gross beta particle activity (pCi/L) in California

There are no violations reported for this contaminant in California