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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Riversedge

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND40ND

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
2014-02-041401-01484ND
2014-05-051404-01246ND
2014-08-271407-01742ND
2014-11-101410-01055ND
2015-01-2812324322ND
2015-05-0712792531ND
2015-08-2513305038ND
2015-10-2813429293ND
2016-03-0714023652ND
2016-05-0914300991ND
2016-09-0114962435ND
2016-11-1715271602ND
2017-02-1315698695ND
2017-05-0416147026ND
2017-08-1016616924ND
2017-11-0217066302ND
2018-02-131801-01287ND
2018-05-011804-01601ND
2018-08-021807-02355ND
2018-11-011810-01590ND
2019-02-071901-01332ND
2019-05-091904-01972ND
2019-08-011907-03116ND
2019-11-061910-01541ND