The Power of Information

National Drinking Water Database

Uranium-238 in Montana

Uranium-238 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 Montana

1 water utilities reported detecting Uranium-238 in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Uranium-238 level

RankSystem Population Served Positive test results of total reported tests Average Level
1Rocky Mountain Wua
Clancy, MT
351 of 1<0.01 pCi/L
(< .01 to 0.001 pCi/L)

Health Based Limits for Uranium-238

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-238 in Montana

There are no violations reported for this contaminant in Montana