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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Upper Hanover Water Authority

Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.

MORE ABOUT THIS CONTAMINANT

 

42

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND70ND
2015ND70ND
2016ND70ND
2017ND70ND
2018ND70ND
2019ND70ND

ppm = parts per million

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 1 ppm

The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.

ppm = parts per million

All test results

Date Lab ID Result
2014-03-05140009141ND
2014-03-05140009142ND
2014-03-05140009143ND
2014-03-05140009144ND
2014-05-14140020008ND
2014-07-23140032264ND
2014-11-05140050163ND
2015-02-1812402245ND
2015-02-1812402247ND
2015-02-1812402249ND
2015-02-1812402251ND
2015-04-2212633694ND
2015-07-2913013366ND
2015-10-2813389821ND
2016-02-0313753543ND
2016-02-0313753537ND
2016-02-0313753541ND
2016-02-0313753539ND
2016-04-0614103484ND
2016-05-1114251517ND
2016-08-1714736407ND
2017-01-1715518014ND
2017-01-1715518015ND
2017-01-1715518016ND
2017-01-1715518013ND
2017-04-0515938169ND
2017-07-1916414445ND
2017-10-1816880887ND
2018-01-318001977-04ND
2018-01-318001977-03ND
2018-01-318001977-02ND
2018-01-318001977-01ND
2018-04-258008139-01ND
2018-07-188017905-01ND
2018-10-038028640-01ND
2019-01-238038657-03ND
2019-01-238038657-04ND
2019-01-238038657-01ND
2019-02-199005846-01ND
2019-05-079009684-01ND
2019-08-278038659-01ND
2019-12-109021812-01ND