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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

City Of Modesto, De Hillcrest

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

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND30ND
2016ND60ND
2017ND60ND
2018ND80ND
2019N/A00N/A

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
2014-01-085203-004-0915ND
2014-02-055203-002-0905ND
2014-06-045203-001-0825ND
2015-01-075203-004-0740ND
2015-02-045203-002-0815ND
2015-06-035203-001-0825ND
2016-01-065203-002-0940ND
2016-01-065203-004-1150ND
2016-04-065203-002-0740ND
2016-06-015203-001-0810ND
2016-07-065203-002-0755ND
2016-10-055203-002-0745ND
2017-01-045203-002-0830ND
2017-01-045203-004-0910ND
2017-04-055203-002-0745ND
2017-06-075203-001-0805ND
2017-07-055203-002-0740ND
2017-10-165203-002-0100ND
2018-01-105203-002-0850ND
2018-01-105203-004-0950ND
2018-04-045203-002-0840ND
2018-05-141233-010-0830ND
2018-06-065203-001-0833ND
2018-07-065203-002-0823ND
2018-10-035203-002-0730ND
2018-12-271610-008-1150ND