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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Forest Park

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

 

72

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND120ND
2016ND120ND
2017ND120ND
2018ND120ND
2019ND120ND

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
2014-01-15S548388ND
2014-02-03S536056ND
2014-03-24S548100ND
2014-04-03S553438ND
2014-05-06S570485ND
2014-06-04S575603ND
2014-07-02S575750ND
2014-08-14S570607ND
2014-09-16S575821ND
2014-10-14S590585ND
2014-11-05S601803ND
2014-12-29S601750ND
2015-01-22S603610ND
2015-02-11S616819ND
2015-03-09S616101ND
2015-04-13S619860ND
2015-05-20S632159ND
2015-06-16S641254ND
2015-07-08S641665ND
2015-08-17S641323ND
2015-09-23S641383ND
2015-10-08S641233ND
2015-11-09S656056ND
2015-12-07S656117ND
2016-01-11S659397ND
2016-02-18S676541ND
2016-03-07S679473ND
2016-04-18S659547ND
2016-05-16S669875ND
2016-06-07S670048ND
2016-07-19S670187ND
2016-08-18S671226ND
2016-09-13S703968ND
2016-10-10S660883ND
2016-11-28S661050ND
2016-12-07S703724ND
2017-01-19S723474ND
2017-02-02S694926ND
2017-03-08S732544ND
2017-04-05S732539ND
2017-05-04S733753ND
2017-06-07S740609ND
2017-07-11S738761ND
2017-08-14S751222ND
2017-09-12S757088ND
2017-10-03S757283ND
2017-11-01S757094ND
2017-12-12S757100ND
2018-01-24S351115ND
2018-02-14S351114ND
2018-03-08S760234ND
2018-04-09S751229ND
2018-05-09S799969ND
2018-06-28S799731ND
2018-07-26S799855ND
2018-08-09S800132ND
2018-09-20S824565ND
2018-10-19S825368ND
2018-12-06S836819ND
2018-12-06S836818ND
2019-01-11S855935ND
2019-02-26S860582ND
2019-03-12S869258ND
2019-04-10S878373ND
2019-05-06S870823ND
2019-06-20S887887ND
2019-07-22S896482ND
2019-08-22S893591ND
2019-09-06S893624ND
2019-10-15S920630ND
2019-11-07S896761ND
2019-12-18S921153ND