The Power of Information

National Drinking Water Database


Alpha particle activity (excl radon and uranium) in Oregon


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

The Most Polluted Communities in Oregon

70 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)
1River Village Mhp
Ontario, OR
285 of 516.14 pCi/L
(4.69 to 39.1 pCi/L)
2City of Irrigon
Irrigon, OR
1,7406 of 69.39 pCi/L
(3.7 to 13.9 pCi/L)
3City of Spray
Spray, OR
1502 of 29.1 pCi/L
(7 to 11.2 pCi/L)
4Cobblestone Mhp
Medford, OR
602 of 26.05 pCi/L
(3.1 to 9 pCi/L)
5Dun-Rollin Mobile Home Park
Hermiston, OR
1301 of 15.4 pCi/L
(5.4 pCi/L)
6Applegate Mobile Park
Applegate, OR
881 of 15.1 pCi/L
(5.1 pCi/L)
7Hat Rock Water Company
Hermiston, OR
801 of 15 pCi/L
(5 pCi/L)
8Eagle Crest Resort
Redmond, OR
4001 of 14.6 pCi/L
(4.6 pCi/L)
9Terrace Mobile Plaza
Prineville, OR
1001 of 14.6 pCi/L
(4.6 pCi/L)
10Ochoco West Water District
Prineville, OR
3601 of 13.3 pCi/L
(3.3 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 Oregon

There are no violations reported for this contaminant in Oregon