The Power of Information

National Drinking Water Database

Combined Radium (-226 & -228) in California

Radium is a radioactive element usually found around uranium deposits. [read more]

The Most Polluted Communities in California

169 water utilities reported detecting Combined Radium (-226 & -228) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Combined Radium (-226 & -228) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Melody Oaks Trailer Park
Jackson, CA
1201 of 110.96 pCi/L
(10.96 pCi/L)
2@fcsa #40/Del Rio
Firebaugh, CA
1431 of 16.29 pCi/L
(6.29 pCi/L)
3City of Corona
Corona, CA
150,2532 of 24.22 pCi/L
(0.62 to 7.83 pCi/L)
4Volcano Community Service Dist
Volcano, CA
1601 of 13.2 pCi/L
(3.2 pCi/L)
5Fcwwd #40/Shaver Springs
Pineridge, CA
1284 of 42.64 pCi/L
(1.78 to 4.15 pCi/L)
6Mineral Mountain Mutual Water
Murphys, CA
481 of 12.45 pCi/L
(2.45 pCi/L)
7Warner Springs Estates
Warner Springs, CA
1505 of 52.08 pCi/L
(1.29 to 2.82 pCi/L)
8Cal AM Water Company - Hidden Hills
Monterey, CA
1,2241 of 11.85 pCi/L
(1.85 pCi/L)
9Md#73 Quartz Mountain
Coarsegold, CA
3751 of 11.76 pCi/L
(1.76 pCi/L)
10Lakeside Wd
Lakeside, CA
25,0003 of 31.63 pCi/L
(0.93 to 2.8 pCi/L)

Health Based Limits for Combined Radium (-226 & -228)

Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 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.5 pCi/L

Violation Summary for Combined Radium (-226 & -228) in California

There are no violations reported for this contaminant in California