The Power of Information

National Drinking Water Database


Radon in Massachusetts


Radon is a radioactive breakdown product of radium and uranium in soil, rock and water; it is often present in groundwater. [read more]

The Most Polluted Communities in Massachusetts

70 water utilities reported detecting Radon in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Radon level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Buffumville Heights Estates Condominium
Oxford, MA
401 of 125400 pCi/L
(25400 pCi/L)
2Pinewood ON The Green Condos
Oxford, MA
507 of 711427.14 pCi/L
(560 to 21000 pCi/L)
3Woodvale Condominium
Acton, MA
1703 of 311233.33 pCi/L
(11000 to 11600 pCi/L)
4Maillet Woods Condominiums
MA
751 of 19200 pCi/L
(9200 pCi/L)
5Leicester Water Supply District
Leicester, MA
3,3006 of 68438.89 pCi/L
(3783.33 to 11000 pCi/L)
6Harvard Green Condominiums
Harvard, MA
1501 of 18400 pCi/L
(8400 pCi/L)
7Foxglove Apartments
Harvard, MA
251 of 17800 pCi/L
(7800 pCi/L)
8Trail Ridge Condominiums
MA
1045 of 56885 pCi/L
(4775 to 9450 pCi/L)
9Haystack Estates
MA
757 of 106410.67 pCi/L
(0 to 12150 pCi/L)
10Wampus Avenue Apartments
Acton, MA
701 of 16330 pCi/L
(6330 pCi/L)

Health Based Limits for Radon

StandardDescriptionLevel
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.1.5 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.150 pCi/L

Violation Summary for Radon in Massachusetts

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

Violation TypeNumber of Violations
Failure to monitor regularly2