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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Wailuku

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

 

101

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND240ND
2015ND170ND
2016ND180ND
2017ND150ND
2018ND120ND
2019ND150ND

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
2014-03-24201032406ND
2014-03-24201032407ND
2014-03-24201032408ND
2014-03-24201032409ND
2014-03-24201032410ND
2014-03-242014032404ND
2014-03-242014032405ND
2014-03-242014032406ND
2014-03-242014032407ND
2014-03-242014032408ND
2014-03-242014032409ND
2014-03-242014032410ND
2014-03-27201032708ND
2014-03-27201032709ND
2014-03-27201032710ND
2014-03-27201032714ND
2014-03-272014032708ND
2014-03-272014032709ND
2014-03-272014032710ND
2014-03-272014032714ND
2014-03-272014032715ND
2014-03-312014033101ND
2014-03-312014033102ND
2014-03-312014033103ND
2015-01-262015012601ND
2015-01-262015012602ND
2015-01-262015012603ND
2015-01-262015012604ND
2015-01-262015012605ND
2015-01-282015012806ND
2015-01-282015012807ND
2015-01-282015012808ND
2015-01-282015012809ND
2015-01-282015012810ND
2015-01-282015012811ND
2015-01-282015012812ND
2015-01-282015012813ND
2015-06-032015060303ND
2015-06-032015060304ND
2015-09-082015090814ND
2015-09-082015090815ND
2016-03-31ND
2016-03-31ND
2016-03-31ND
2016-03-31ND
2016-09-12ND
2016-09-12ND
2016-11-30ND
2016-11-30ND
2016-11-30ND
2016-11-30ND
2016-11-30ND
2016-11-30ND
2016-11-30ND
2016-12-14ND
2016-12-14ND
2016-12-15ND
2016-12-15ND
2016-12-15ND
2017-09-07ND
2017-09-07ND
2017-09-07ND
2017-09-07ND
2017-09-14ND
2017-09-14ND
2017-09-14ND
2017-09-14ND
2017-09-14ND
2017-09-14ND
2017-09-14ND
2017-09-14ND
2017-09-21ND
2017-09-21ND
2017-12-06ND
2018-01-30201802010037ND
2018-02-26201802280133ND
2018-02-26201802280134ND
2018-02-26201802280124ND
2018-02-26201802280125ND
2018-02-27201803010016ND
2018-02-27201803010018ND
2018-02-27201803010017ND
2018-02-27201803010020ND
2018-02-27201803010019ND
2018-04-18201804200168ND
2018-06-14201806150965ND
2019-05-222019052204ND
2019-05-222019052205ND
2019-05-222019052206ND
2019-05-222019052207ND
2019-05-222019052208ND
2019-11-252019112505ND
2019-11-252019112504ND
2019-11-252019112502ND
2019-11-252019112503ND
2019-11-252019112501ND
2019-12-052019120505ND
2019-12-052019120501ND
2019-12-052019120502ND
2019-12-052019120503ND
2019-12-052019120504ND