The Power of Information

National Drinking Water Database


Radon in New Hampshire


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 New Hampshire

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)
1Governors Forest
NH
01 of 127000 pCi/L
(27000 pCi/L)
2Briar Court Estates
Goffstown, NH
1133 of 318483.67 pCi/L
(851 to 32400 pCi/L)
3Emerald Acres
Barrington, NH
2501 of 115000 pCi/L
(15000 pCi/L)
4Glen Ridge Dev
Derry, NH
2552 of 214450 pCi/L
(12300 to 16600 pCi/L)
5Danville Four Seasons
Danville, NH
1292 of 212500 pCi/L
(11000 to 14000 pCi/L)
6Badger Hill
Milford, NH
2131 of 111900 pCi/L
(11900 pCi/L)
7Grappone Honda
NH
401 of 110351 pCi/L
(10351 pCi/L)
8Fountain Springs
NH
01 of 18200 pCi/L
(8200 pCi/L)
9Whip O Will Condominiums
Bridgewater, NH
451 of 16700 pCi/L
(6700 pCi/L)
10Sherwood Forest
Wolfeboro, NH
552 of 25950 pCi/L
(5100 to 6800 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 New Hampshire

There are no violations reported for this contaminant in New Hampshire