The Power of Information

National Drinking Water Database

Alpha particle activity (incl. radon & uranium) in New York

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

The Most Polluted Communities in New York

476 water utilities reported detecting Alpha particle activity (incl. radon & 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 (incl. radon & uranium) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Pawling Village
Pawling, NY
2,1815 of 529.78 pCi/L
(23.14 to 35.4 pCi/L)
2Sunset Ridge Water District
North Salem, NY
2825 of 520.64 pCi/L
(13.84 to 31.15 pCi/L)
3Lime Ridge Farm
Mahopac Falls, NY
253 of 316.6 pCi/L
(12.7 to 20 pCi/L)
4Patterson Village Condominiums
Patterson, NY
2101 of 113.5 pCi/L
(13.5 pCi/L)
5Hillsdale Garden Apts.
Hudson, NY
401 of 112.8 pCi/L
(12.8 pCi/L)
6Carmel WD 7
Mahopac, NY
3004 of 412.42 pCi/L
(9.3 to 17 pCi/L)
7Cornwall Meadows Townhomes W.S.
Bedford, NY
2307 of 712.35 pCi/L
(8.5 to 19.13 pCi/L)
8Highfields Condo
Putnam Valley, NY
507 of 711.65 pCi/L
(8.4 to 16.02 pCi/L)
9Hilltop Meadows Water Supply
Millbrook, NY
1961 of 111.2 pCi/L
(11.2 pCi/L)
10Shorehaven Civic Assoc
Holmes, NY
3003 of 311.07 pCi/L
(9.3 to 14.2 pCi/L)

Health Based Limits for Alpha particle activity (incl. radon & uranium)

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 Alpha particle activity (incl. radon & uranium) in New York

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

Violation TypeNumber of Violations
Failure to monitor regularly138