The Power of Information

National Drinking Water Database

Alpha particle activity (incl. radon & uranium) in Arizona

Alpha particles are a form of radiation associated with mining waste pollutants and natural sources. [read more]

The Most Polluted Communities in Arizona

132 water utilities reported detecting Alpha particle activity (incl. radon & uranium) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Alpha particle activity (incl. radon & uranium) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Town of Duncan
Duncan, AZ
6804 of 424.3 pCi/L
(19.35 to 27.4 pCi/L)
2Northern Section 4 Co-Op
Apache Junction, AZ
394 of 420.58 pCi/L
(12.6 to 30.6 pCi/L)
3Sherman Pines Water Co
Prescott, AZ
905 of 611.62 pCi/L
(0 to 15.6 pCi/L)
4Town of Eagar
Eagar, AZ
4,0004 of 410.94 pCi/L
(9.65 to 13.05 pCi/L)
5New Saddleback Vista Dwid
Maricopa, AZ
20010 of 1110.66 pCi/L
(0 to 17 pCi/L)
6Lake Mead Nra-Temple Bar
Boulder City, AZ
3041 of 110.5 pCi/L
(10.5 pCi/L)
7Rancho Del Conejo Water
Tucson, AZ
9994 of 49.98 pCi/L
(9.6 to 10.6 pCi/L)
8City of ST Johns
St Johns, AZ
3,2701 of 19.6 pCi/L
(9.6 pCi/L)
9Avra Water Coop, Inc
Tucson, AZ
7,7504 of 49.1 pCi/L
(7.3 to 10.4 pCi/L)
10Quail Creek Water Co
Tucson, AZ
3,0218 of 109.08 pCi/L
(0 to 13.7 pCi/L)

Health Based Limits for Alpha particle activity (incl. radon & uranium)

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 Alpha particle activity (incl. radon & uranium) in Arizona

There are no violations reported for this contaminant in Arizona