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National Drinking Water Database

Gross beta particle activity (pCi/L) in Oregon

Beta particles are a form of radiation frequently associated with nuclear testing and radioactive mineral deposits. [read more]

The Most Polluted Communities in Oregon

19 water utilities reported detecting Gross beta particle activity (pCi/L) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Gross beta particle activity (pCi/L) level

RankSystem Population Served Positive test results of total reported tests Average Level
1City of Wasco
Wasco, OR
3802 of 29.45 pCi/L
(5.7 to 13.2 pCi/L)
2Clackamas River Water - Clairmont
Clackamas, OR
14,7001 of 19.2 pCi/L
(9.2 pCi/L)
3Shield Crest Water Assn
Klamath Falls, OR
451 of 15.88 pCi/L
(5.88 pCi/L)
4City of Moro
Moro, OR
2921 of 15.7 pCi/L
(5.7 pCi/L)
5Steeves Mobile City
Milwaukie, OR
1003 of 34.1 pCi/L
(2.9 to 5.2 pCi/L)
6Portland Water Bureau
Portland, OR
539,2001 of 13.6 pCi/L
(3.6 pCi/L)
7Star Satellite Improv Dist
Banks, OR
4001 of 13.5 pCi/L
(3.5 pCi/L)
8City of Scappoose
Scappoose, OR
5,8252 of 23.2 pCi/L
(2.7 to 3.7 pCi/L)
9City of Woodburn
Woodburn, OR
22,0001 of 12.27 pCi/L
(2.27 pCi/L)
10Columbia City Mun Waterworks
Columbia City, OR
1,8242 of 22.18 pCi/L
(1.7 to 2.65 pCi/L)

Health Based Limits for Gross beta particle activity (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 Gross beta particle activity (pCi/L) in Oregon

There are no violations reported for this contaminant in Oregon