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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Lahaina

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.

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39

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND60ND
2015ND60ND
2016ND90ND
2017ND70ND
2018ND50ND
2019ND60ND

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
2014-03-272014033105ND
2014-03-312014033104ND
2014-03-312014033107ND
2014-03-312014033106ND
2014-04-292014042907ND
2014-04-292014042908ND
2015-01-262015012612ND
2015-01-262015012613ND
2015-01-262015012614ND
2015-01-282015012803ND
2015-01-282015012804ND
2015-01-282015012805ND
2016-03-29ND
2016-03-29ND
2016-03-29ND
2016-03-29ND
2016-03-29ND
2016-09-26ND
2016-09-26ND
2016-11-28ND
2016-11-28ND
2017-09-07ND
2017-09-07ND
2017-09-07ND
2017-09-07ND
2017-10-30ND
2017-10-30ND
2017-10-30ND
2018-02-12201802140034ND
2018-02-12201802140035ND
2018-02-26201802280132ND
2018-02-27201803010015ND
2018-02-27201803010014ND
2019-10-212019102101ND
2019-10-212019102102ND
2019-10-212019102103ND
2019-10-212019102105ND
2019-10-212019102106ND
2019-10-212019102104ND