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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Iredell Water Corporation

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

 

70

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
2014ND120ND
2015ND120ND
2016ND110ND
2017ND110ND
2018ND130ND
2019ND110ND

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
2014-01-0614016-44ND
2014-03-03140303-19ND
2014-03-03140303-24ND
2014-04-15140415-21ND
2014-04-15140415-20ND
2014-04-15140415-8ND
2014-06-17140617-29ND
2014-07-09140709-30ND
2014-08-11140811-2.5ND
2014-08-11140811-2.9ND
2014-10-06141006-28ND
2014-11-10141110-08-01ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-04-14ND
2015-04-14ND
2015-04-14ND
2015-04-14ND
2015-07-14ND
2015-07-14ND
2015-07-14ND
2015-10-14ND
2015-11-18ND
2016-01-13160113-12-01ND
2016-01-13160113-13-01ND
2016-01-27160127-17-01ND
2016-03-16160316-27-01ND
2016-04-26160426-25-01ND
2016-04-26160426-27-01ND
2016-06-21160621-13-01ND
2016-07-06160706-26-01ND
2016-08-24160824-08-01ND
2016-10-04161004-33-01ND
2016-10-04161004-27-01ND
2017-01-18170118-36-01ND
2017-01-18170118-39-01ND
2017-02-22170222-09-01ND
2017-02-22170222-10-02ND
2017-03-22170322-19-01ND
2017-03-22170322-17-03ND
2017-04-05170405-20-01ND
2017-04-05170405-17-01ND
2017-05-24170524-24-01ND
2017-07-19170719-22-01ND
2017-10-23171023-13-01ND
2018-01-10180110-30-01 ND
2018-01-10180110-29-01 ND
2018-02-21180221-22-06 ND
2018-02-21180221-22-05 ND
2018-02-21180221-22-03 ND
2018-02-21180221-22-02 ND
2018-03-21180321-16-01 ND
2018-04-23180423-30-03 ND
2018-05-02180502-15-01 ND
2018-05-09180509-22-05 ND
2018-06-27180627-25-01 ND
2018-07-12180712-22-01 ND
2018-10-09181009-43-01 ND
2019-01-09190109-23-01 ND
2019-01-09190109-23-02 ND
2019-01-09190109-23-06 ND
2019-04-10190410-26-02 ND
2019-04-10190410-26-03 ND
2019-04-10190410-26-01 ND
2019-04-10190410-21-01 ND
2019-05-08190508-22-01 ND
2019-07-10190710-29-04 ND
2019-09-16190916-27-01 ND
2019-10-09191009-32-01 ND