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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Horsham Water&sewer Authority

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

 

67

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND130ND
2015ND120ND
2016ND120ND
2017ND90ND
2018ND80ND
2019ND130ND

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
2014-01-24AE21287ND
2014-06-11AE36012ND
2014-06-11AE35999ND
2014-06-18AE36842ND
2014-06-19AE36843ND
2014-07-16AE40459ND
2014-07-17AE40472ND
2014-08-06AE42988ND
2014-08-06AE42989ND
2014-08-20AE45072ND
2014-08-20AE45071ND
2014-09-11AE47569ND
2014-09-18AE48162ND
2015-03-0412401632ND
2015-03-0412401635ND
2015-03-0412401637ND
2015-03-0412401639ND
2015-03-0412401640ND
2015-03-0412401642ND
2015-03-0412401645ND
2015-03-0412401647ND
2015-03-0412401649ND
2015-03-0412401651ND
2015-03-0412401653ND
2015-05-0612749105ND
2016-02-1613870278ND
2016-02-1613870276ND
2016-02-1613870272ND
2016-02-1613870270ND
2016-02-1613870268ND
2016-02-1613870266ND
2016-02-1613870264ND
2016-02-1613870258ND
2016-02-1613870262ND
2016-02-1713870260ND
2016-02-1713870274ND
2016-06-2114405420ND
2017-02-1415654774ND
2017-02-1415654768ND
2017-02-1415654770ND
2017-02-1415654776ND
2017-02-1415654772ND
2017-04-1815936298ND
2017-04-1815936296ND
2017-04-1815936300ND
2017-04-1815936302ND
2018-02-28AF77336ND
2018-02-28AF77334ND
2018-02-28AF77335ND
2018-02-28AF77333ND
2018-02-28AF77331ND
2018-06-22AF86999ND
2018-08-30AF94269ND
2018-12-27AG04620ND
2019-02-11AG07772ND
2019-02-11AG07773ND
2019-02-11AG07771ND
2019-02-11AG07775ND
2019-03-06AG10054ND
2019-03-06AG10054ND
2019-05-09AG16016ND
2019-05-09AG16019ND
2019-05-23AG16891ND
2019-06-13AG19933ND
2019-08-21AG28299ND
2019-09-18AG31925ND
2019-09-18AG31924ND