The Power of Information

National Drinking Water Database


Uranium-234 in Arizona


Uranium-234 is a radioactive element commonly found in most rocks; processed ore is used for power generation and weapons manufacture. [read more]

The Most Polluted Communities in Arizona

4 water utilities reported detecting Uranium-234 in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Uranium-234 level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1City of EL Mirage
El Mirage, AZ
11,6001 of 1<0.01 pCi/L
(< .01 to 0.00027 pCi/L)
2City of Avondale
Avondale, AZ
22,0005 of 6<0.01 pCi/L
(< .01 to 0.00027 pCi/L)
3City of Scottsdale
Scottsdale, AZ
180,0001 of 2<0.01 pCi/L
(< .01 to 0.00027 pCi/L)
4City of Peoria
Peoria, AZ
86,0001 of 11<0.01 pCi/L
(< .01 to 0.00028 pCi/L)

Health Based Limits for Uranium-234

StandardDescriptionLevel
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.0.03 pCi/L

Violation Summary for Uranium-234 in Arizona

There are no violations reported for this contaminant in Arizona