The Power of Information

National Drinking Water Database


Radium-228 in Arizona


Radium-228 is a radioactive element usually found around uranium deposits. [read more]

The Most Polluted Communities in Arizona

11 water utilities reported detecting Radium-228 in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Radium-228 level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Aspc Apache
Winslow, AZ
3351 of 11.1 pCi/L
(1.1 pCi/L)
2Ponderosa Park Water Impr
Prescott, AZ
5003 of 50.42 pCi/L
(0 to 0.8 pCi/L)
3Red Rock Acres Hoa
AZ
291 of 30.32 pCi/L
(0 to 0.95 pCi/L)
4A Petersen Water Co
Clay Springs, AZ
701 of 20.3 pCi/L
(0 to 0.6 pCi/L)
5City of Holbrook
Holbrook, AZ
5,0002 of 40.3 pCi/L
(0 to 0.7 pCi/L)
6City of Lake Havasu
Lake Havasu City, AZ
43,0002 of 20.27 pCi/L
(0.09 to 0.46 pCi/L)
7Sherman Pines Water Co
Prescott, AZ
901 of 30.17 pCi/L
(0 to 0.5 pCi/L)
8Metropolitan Dwid
Tucson, AZ
43,4331 of 100.08 pCi/L
(0 to 0.83 pCi/L)
9Johnson Utilities
Scottsdale, AZ
47,9471 of 40.06 pCi/L
(0 to 0.22 pCi/L)
10Town of Gilbert
Gilbert, AZ
100,0002 of 270.04 pCi/L
(0 to 0.66 pCi/L)

Health Based Limits for Radium-228

StandardDescriptionLevel
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
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.0.02 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
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 Radium-228 in Arizona

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Arizona since 2004

Violation TypeNumber of Violations
Failure to monitor regularly118