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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Aqua Pa Superior Main System

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

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND50ND
2015ND50ND
2016ND60ND
2017ND60ND
2018ND90ND
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
2014-06-232013945004ND
2014-06-232013945005ND
2014-06-232013945001ND
2014-06-232013945002ND
2014-06-232013945003ND
2015-02-2512405572ND
2015-02-2512405574ND
2015-02-2512405576ND
2015-02-2512405578ND
2015-02-2512405580ND
2016-05-2414255370ND
2016-05-2414255368ND
2016-05-2414255366ND
2016-05-2414255362ND
2016-05-2414255364ND
2016-09-0614913006ND
2017-04-2715942513ND
2017-04-2715942511ND
2017-04-2715942515ND
2017-04-2715942517ND
2017-04-2715942509ND
2017-04-2715942519ND
2018-03-14AF78840ND
2018-05-29AF85267ND
2018-07-30AF91182ND
2018-07-30AF91183ND
2018-07-30AF91184ND
2018-07-30AF91180ND
2018-07-30AF91181ND
2018-07-30AF91185ND
2018-07-30AF91186ND
2019-08-08AG27404ND
2019-08-08AG27405ND
2019-08-08AG27402ND
2019-08-08AG27403ND
2019-08-08AG27407ND
2019-08-08AG27401ND
2019-08-08AG27400ND