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National Drinking Water Database

Alpha particle activity in Washington

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

The Most Polluted Communities in Washington

99 water utilities reported detecting Alpha particle activity 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 level

RankSystem Population Served Positive test results of total reported tests Average Level
1Schoonover Hutterian Brethren
Odessa, WA
351 of 129.3 pCi/L
(29.3 pCi/L)
2Lakeside Park
Kettle Falls, WA
751 of 124.3 pCi/L
(24.3 pCi/L)
3Progressive Flat Water Assn
Okanogan, WA
1453 of 321.88 pCi/L
(12.8 to 27.5 pCi/L)
4Stevens Co Pud - Chatteroy Springs North
Chattaroy, WA
371 of 115.94 pCi/L
(15.94 pCi/L)
5City of Okanogan Water Department
Okanogan, WA
2,4351 of 114.9 pCi/L
(14.9 pCi/L)
6Clearwater Domestic Water Assn
Othello, WA
782 of 214.55 pCi/L
(0.49 to 28.6 pCi/L)
7Country Villa Mobile Park
Colville, WA
1203 of 312.95 pCi/L
(6.8 to 21 pCi/L)
8Johnson Creek Water Users Assn
Riverside, WA
488 of 812.5 pCi/L
(6.16 to 27.15 pCi/L)
9Lakeshore Mobile Home Court
Anacortes, WA
1001 of 110.84 pCi/L
(10.84 pCi/L)
10Stevens Co Pud - River Park Estates
Loon Lake, WA
421 of 110.79 pCi/L
(10.79 pCi/L)

Health Based Limits for Alpha particle activity

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
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 in Washington

There are no violations reported for this contaminant in Washington