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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

Monterey Park Water Department

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND50ND
2014ND10ND
2015ND20ND
2016ND40ND
2017ND10ND

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
2012-08-149588-038-0935ND
2012-10-313761-006-1345ND
2012-11-059588-006-0940ND
2012-11-083761-038-0810ND
2013-02-059588-013-1020ND
2013-02-059588-010-1035ND
2013-03-283761-013-0915ND
2013-08-209588-001-0920ND
2013-11-199588-011-1120ND
2014-08-219588-002-0945ND
2015-08-259588-038-1035ND
2015-11-109588-006-1100ND
2016-02-189588-013-1045ND
2016-02-189588-010-1030ND
2016-08-119588-001-0905ND
2016-08-119588-011-0930ND
2017-08-159588-002-0915ND