The Power of Information

National Drinking Water Database

Perchlorate in New York

Perchlorate is a synthetic oxygen additive in solid fuel propellant for rockets, missiles, and fireworks, and is primarily used by the military and the space industry; it may occur naturally in certain imported agricultural fertilizers. [read more]

The Most Polluted Communities in New York

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

Ranked by highest average Perchlorate level

RankSystem Population Served Positive test results of total reported tests Average Level
1Westbury Wd
Westbury, NY
20,50014 of 155.69 ppb
(0 to 13.2 ppb)
2Locust Valley Wd
Locust Valley, NY
7,50013 of 224.8 ppb
(0 to 9.8 ppb)
3Plainview Wd
Plainview, NY
35,00037 of 443.8 ppb
(0 to 7.5 ppb)
4Town of Hempstead Wd
East Meadow, NY
110,00054 of 673.28 ppb
(0 to 6.2 ppb)
5Bethpage Wd
Bethpage, NY
33,00040 of 493.16 ppb
(0 to 7.2 ppb)
6Garden City (V)
Garden City, NY
21,68621 of 272.66 ppb
(0 to 5.2 ppb)
7Hicksville Wd
Hicksville, NY
47,810136 of 1412.53 ppb
(0 to 12.8 ppb)
8Glen Cove City
Glen Cove, NY
28,00016 of 202.22 ppb
(0 to 5.15 ppb)
9Jericho Wd
Syosset, NY
58,00030 of 322.04 ppb
(0 to 5.4 ppb)
10WA of Great Neck North
Great Neck, NY
31,40043 of 791.14 ppb
(0 to 5.2 ppb)

Health Based Limits for Perchlorate

Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.5 ppb
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.6 ppb

Violation Summary for Perchlorate in New York

There are no violations reported for this contaminant in New York