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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

City of Lewiston

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.

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.00500 ppm41ND - 0.0200 ppm
2013ND70ND
2014ND60ND
2015ND70ND
2016ND40ND
2017ND90ND

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
2012-04-03N59254ND
2012-04-03I59255ND
2012-08-15I62177ND
2012-08-15I621780.0200 ppm
2013-02-27N130228026-002ND
2013-02-27I130228026-001ND
2013-06-05I130606050-001ND
2013-06-05I130606050-002ND
2013-08-21I130822058-001ND
2013-08-21I130822058-005ND
2013-08-21I130822058-004ND
2014-02-25I140226039-001ND
2014-02-25I140226039-002ND
2014-06-03I140604041-002ND
2014-06-03I140604041-001ND
2014-08-13I140814054-004ND
2014-08-13I140814054-005ND
2015-01-21N150122025-002ND
2015-01-21I150122025-001ND
2015-04-21I150422037-001ND
2015-06-10I150611032-002ND
2015-06-10I150611032-001ND
2015-07-22I150723044-001ND
2015-07-22I150723044-003ND
2016-02-09I160209050-001ND
2016-02-09I160209050-002ND
2016-04-06I160407008-003ND
2016-04-06I160407008-001ND
2017-03-28I170328050-001ND
2017-03-28I170328050-002ND
2017-10-25I171026026-001ND
2017-10-25I171026026-002ND
2017-10-25I171026026-003ND
2017-11-07N171108034-002ND
2017-11-07N171108034-004ND
2017-11-07N171108034-003ND
2017-11-07N171108034-001ND