The Power of Information

National Drinking Water Database

Alpha particle activity in New York

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

The Most Polluted Communities in New York

501 water utilities reported detecting Alpha particle activity 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 level

RankSystem Population Served Positive test results of total reported tests Average Level
1Oakridge Water District
South Salem, NY
89212 of 1224.18 pCi/L
(11.8 to 35.35 pCi/L)
2Highfields Condo
Putnam Valley, NY
5013 of 1320.65 pCi/L
(10.5 to 28.5 pCi/L)
3Cedar Valley Waterworks
Hyde Park, NY
3753 of 317.58 pCi/L
(5.4 to 35.95 pCi/L)
4Lime Ridge Farm
Mahopac Falls, NY
2511 of 1117.44 pCi/L
(11.4 to 29.1 pCi/L)
5Pawling Village
Pawling, NY
2,1812 of 216.45 pCi/L
(9.8 to 23.1 pCi/L)
6Cedar Meadow Water Corp/Cameo Farm
Poughquag, NY
20013 of 1516.2 pCi/L
(0 to 26.5 pCi/L)
7Croton Falls Water District
North Salem, NY
1758 of 815.7 pCi/L
(10.3 to 22.3 pCi/L)
8Somers Chase Water Works Corp
Bedford, NY
22411 of 1115.3 pCi/L
(6.35 to 24.3 pCi/L)
9Cornwall Meadows Townhomes W.S.
Bedford, NY
23016 of 1615.04 pCi/L
(4.5 to 36.8 pCi/L)
10Shorehaven Civic Assoc
Holmes, NY
30017 of 1714.92 pCi/L
(7.6 to 29.35 pCi/L)

Health Based Limits for Alpha particle activity

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
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 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 regularly74
Over maximum contaminant level, Average2