The Power of Information

National Drinking Water Database


Alpha particle activity (excl radon and uranium) in Wyoming


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

The Most Polluted Communities in Wyoming

78 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)
1Town of Manville
Manville, WY
971 of 135.4 pCi/L
(35.4 pCi/L)
2Mountain Village Park Inc.
Big Piney, WY
1501 of 113.3 pCi/L
(13.3 pCi/L)
3Town of Pine Bluffs
Pine Bluffs, WY
1,1532 of 211.6 pCi/L
(6.75 to 16.44 pCi/L)
4Meadow Park Homeowners Assoc
Evanston, WY
1001 of 110.3 pCi/L
(10.3 pCi/L)
5Hyattville Service & Improvement Dist
Hyattville, WY
604 of 410.18 pCi/L
(8.6 to 11.7 pCi/L)
6Town of Hulett
Hulett, WY
4094 of 410.15 pCi/L
(2.26 to 15.69 pCi/L)
7Warm Springs Water District
Dubois, WY
554 of 48.85 pCi/L
(4.8 to 13.9 pCi/L)
8City of Newcastle
Newcastle, WY
3,0651 of 18.67 pCi/L
(8.67 pCi/L)
9Salt Creek Water District
Newcastle, WY
6003 of 38.16 pCi/L
(3.96 to 10.86 pCi/L)
10Bennor Subdivision
Gillette, WY
1745 of 57.84 pCi/L
(4.8 to 8.6 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 Wyoming

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

Violation TypeNumber of Violations
Failure to monitor regularly15