The Power of Information

National Drinking Water Database


Alpha particle activity (excl radon and uranium) in Montana


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

The Most Polluted Communities in Montana

244 water utilities reported detecting Alpha particle activity (excl radon and 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 (excl radon and uranium) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Lakeshore Heights Hoa
Kalispell, MT
1006 of 618.86 pCi/L
(11.35 to 26.55 pCi/L)
2Beaverhead Jackson Water and Sewer Dist
Jackson, MT
301 of 114.9 pCi/L
(14.9 pCi/L)
3Town of Nashua
Nashua, MT
3252 of 214 pCi/L
(11 to 17 pCi/L)
4Sand Coulee Water Users Assn
Sand Coulee, MT
1613 of 313.73 pCi/L
(10.9 to 17.3 pCi/L)
5Godfrey Canyon Estates
Manhattan, MT
1002 of 213.15 pCi/L
(13.15 pCi/L)
6Eastgate Village Sewer and Water
East Helena, MT
2,0001 of 113.1 pCi/L
(13.1 pCi/L)
7Ranch Co Water and Sewer Dist The
Bigfork, MT
903 of 313.07 pCi/L
(12.7 to 13.8 pCi/L)
8Belfry Carbon Co Water and Sewer Dist
Belfry, MT
2021 of 111.6 pCi/L
(11.6 pCi/L)
9Wells Garden Estates
Billings, MT
2404 of 411.35 pCi/L
(11.35 pCi/L)
10Bigfork County Water and Sewer
Bigfork, MT
2,5849 of 910.88 pCi/L
(0.9 to 22 pCi/L)

Health Based Limits for Alpha particle activity (excl radon and uranium)

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
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.15 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.15 pCi/L
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.15 pCi/L

Violation Summary for Alpha particle activity (excl radon and uranium) in Montana

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

Violation TypeNumber of Violations
Failure to monitor regularly65
Over maximum contaminant level, Average1