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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

City of Redmond Water 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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND40ND
2014ND30ND
2015ND40ND
2016ND40ND
2017ND50ND

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
2012-07-1310230ND
2012-07-1310231ND
2012-07-1310228ND
2012-07-1310229ND
2012-07-1627085ND
2013-07-1109218ND
2013-07-1109221ND
2013-07-1109220ND
2013-07-1109219ND
2014-07-0910298ND
2014-07-0910299ND
2014-07-0910300ND
2015-05-0406243ND
2015-05-0406244ND
2015-05-0406245ND
2015-07-2211484ND
2016-05-18ND
2016-05-18ND
2016-05-18ND
2016-05-18ND
2017-05-03ND
2017-05-03ND
2017-05-03ND
2017-05-03ND
2017-05-03ND