The Power of Information

National Drinking Water Database


Alpha particle activity (excl radon and uranium) in Maryland


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

The Most Polluted Communities in Maryland

168 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)
1Eastern Correctional Institute
Westover, MD
3,5001 of 125 pCi/L
(25 pCi/L)
2Mount Saint Mary's University
Emmitsburg, MD
1,90010 of 1020.1 pCi/L
(9 to 27 pCi/L)
3Town of Poolesville
Poolesville, MD
5,10027 of 2719.21 pCi/L
(1 to 38 pCi/L)
4Stoney Chase/ Rock Creek M.H.P.'s
Elkton, MD
3961 of 119 pCi/L
(19 pCi/L)
5Harbor View
Charlestown, MD
43712 of 1218.25 pCi/L
(5 to 35 pCi/L)
6Concord Estates Mobile Home Park
Waldorf, MD
15017 of 1716.54 pCi/L
(4.1 to 39 pCi/L)
7Chapel Point Woods
La Plata, MD
27811 of 1115.89 pCi/L
(1.03 to 44.7 pCi/L)
8Golden Kay Apartments
Elkton, MD
8913 of 1415.43 pCi/L
(0 to 29 pCi/L)
9Graymount Apartments
Perryville, MD
2712 of 1213.75 pCi/L
(3 to 25 pCi/L)
10Town of New Windsor
New Windsor, MD
1,1002 of 212.5 pCi/L
(12 to 13 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 Maryland

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

Violation TypeNumber of Violations
Over maximum contaminant level, Average13