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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Aqua Pennsylvania Main 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.

MORE ABOUT THIS CONTAMINANT

 

155

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND260ND
2015ND250ND
2016ND260ND
2017ND270ND
2018ND280ND
2019ND230ND

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
2014-01-09AE19808ND
2014-01-22AE21243ND
2014-02-26AE23735ND
2014-04-14AE29526ND
2014-04-15AE29507ND
2014-04-16AE29601ND
2014-04-16AE29575ND
2014-04-16AE29621ND
2014-04-23AE29839ND
2014-04-23AE29840ND
2014-04-23AE29844ND
2014-04-24AE29947ND
2014-05-20AE33390ND
2014-05-21AE33423ND
2014-06-04AE34742ND
2014-06-05AE34728ND
2014-07-23AE40896ND
2014-07-24AE40881ND
2014-07-30AE41714ND
2014-09-16AE48218ND
2014-09-17AE48105ND
2014-10-14AE52849ND
2014-10-22AE53545ND
2014-10-22AE53537ND
2014-10-22AE53539ND
2014-10-23AE53645ND
2015-01-0712289890ND
2015-01-0712289911ND
2015-01-0812289907ND
2015-01-2112289909ND
2015-01-2312290830ND
2015-02-0412404563ND
2015-02-0412404565ND
2015-02-0412404567ND
2015-02-0412404570ND
2015-02-0412404572ND
2015-02-0512404573ND
2015-02-0512404575ND
2015-03-1612518501ND
2015-03-1712518503ND
2015-03-1712518511ND
2015-03-1812518505ND
2015-03-1812518507ND
2015-03-1812518509ND
2015-04-2212636059ND
2015-05-2112752560ND
2015-07-0813015894ND
2015-07-0913015892ND
2015-08-0513016821ND
2015-10-2113392037ND
2015-10-2213392035ND
2016-01-0613755694ND
2016-01-0713755692ND
2016-01-2013756321ND
2016-01-2113756317ND
2016-01-2113756319ND
2016-01-2813756323ND
2016-01-2813756325ND
2016-01-2813756327ND
2016-03-0313989274ND
2016-03-1013989594ND
2016-03-1413989278ND
2016-03-1513989280ND
2016-03-1713989276ND
2016-03-1813989282ND
2016-04-1114106090ND
2016-04-1114106100ND
2016-04-1314106092ND
2016-04-1314106094ND
2016-04-1314106096ND
2016-04-1414106098ND
2016-06-2214409954ND
2016-07-1314573661ND
2016-07-2914573988ND
2016-08-0414739094ND
2016-10-2415079221ND
2016-10-2715079223ND
2017-01-0515520902ND
2017-01-0515520904ND
2017-04-1715941496ND
2017-04-1915941498ND
2017-06-1916262142ND
2017-06-1916262146ND
2017-06-1916262150ND
2017-06-1916262168ND
2017-06-1916262170ND
2017-06-2016262148ND
2017-06-2016262152ND
2017-06-2016262154ND
2017-06-2016262164ND
2017-06-2116262156ND
2017-06-2116262158ND
2017-06-2116262160ND
2017-06-2116262162ND
2017-06-2116262166ND
2017-06-2616262144ND
2017-07-1916418210ND
2017-07-2016418206ND
2017-07-2016418208ND
2017-08-1016570216ND
2017-08-1416570214ND
2017-10-1216883596ND
2017-10-2316883598ND
2017-12-2117165609ND
2018-01-03AF72790ND
2018-01-10AF72722ND
2018-01-15AF73385ND
2018-01-15AF73390ND
2018-01-17AF73333ND
2018-01-17AF73334ND
2018-01-29AF74445ND
2018-01-31AF74442ND
2018-02-26AF76915ND
2018-02-26AF77264ND
2018-02-26AF76933ND
2018-02-26AF76932ND
2018-02-26AF77278ND
2018-02-27AF76919ND
2018-02-27AF77311ND
2018-02-28AF77455ND
2018-02-28AF77456ND
2018-02-28AF77467ND
2018-03-13AF78030ND
2018-03-26AF79915ND
2018-04-04AF80028ND
2018-04-12AF80425ND
2018-04-12AF80423ND
2018-07-02AF87903ND
2018-07-02AF87901ND
2018-07-02AF87940ND
2018-10-03AF96750ND
2018-10-08AF97343ND
2019-02-06AG07058ND
2019-03-11AG10454ND
2019-03-11AG10450ND
2019-03-11AG10944ND
2019-03-13AG10482ND
2019-03-13AG11162ND
2019-03-13AG11163ND
2019-03-13AG11187ND
2019-03-19AG10263ND
2019-03-19AG10265ND
2019-03-19AG10264ND
2019-03-26AG12576ND
2019-04-08AG13307ND
2019-04-15AG14266ND
2019-04-15AG14254ND
2019-04-24AG14544ND
2019-04-24AG14546ND
2019-05-30AG18878ND
2019-06-19AG20510ND
2019-07-01AG22080ND
2019-09-09AG30872ND
2019-10-02AG33825ND
2019-10-23AG36112ND