The Power of Information

National Drinking Water Database


Alpha particle activity (excl radon and uranium) in New Hampshire


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

The Most Polluted Communities in New Hampshire

477 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)
1Country Lane Manor
Candia, NH
851 of 138.7 pCi/L
(38.7 pCi/L)
2Wagon Wheel Tenant Coop
Londonderry, NH
882 of 237.35 pCi/L
(35 to 39.7 pCi/L)
3Saco Woods Condominiums
Conway, NH
2403 of 336.33 pCi/L
(26 to 43 pCi/L)
4Slope N Shore Club
New London, NH
1802 of 235.65 pCi/L
(32.3 to 39 pCi/L)
5Todd Farm
NH
51 of 133 pCi/L
(33 pCi/L)
6Mountainside AT Attitash
Bartlett, NH
16721 of 2132.37 pCi/L
(9 to 43.5 pCi/L)
7Saco Ridge Water Inc
Bartlett, NH
838 of 831.63 pCi/L
(<0.01 to 43.5 pCi/L)
8Fitzwilliam Village /Massin
Fitzwilliam, NH
534 of 431.05 pCi/L
(20 to 43.13 pCi/L)
9Countryside Homes
Fremont, NH
1382 of 231 pCi/L
(21 to 41 pCi/L)
10Stonehenge Trust Apts
Londonderry, NH
1054 of 429.38 pCi/L
(21.5 to 43 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 New Hampshire

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

Violation TypeNumber of Violations
Over maximum contaminant level, Average121
Failure to monitor regularly18