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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

Pennsylvania American Royersford

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.

 

79

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND120ND
2013ND140ND
2014ND140ND
2015ND140ND
2016ND140ND
2017ND110ND

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
2012-01-0515638301ND
2012-01-0515638401ND
2012-04-1017209801ND
2012-04-1017392501ND
2012-04-1017211501ND
2012-04-1017392701ND
2012-07-1018895101ND
2012-07-1017392801ND
2012-07-1017392601ND
2012-10-0219879201ND
2012-10-0219878801ND
2012-10-0219879301ND
2013-01-0820724501ND
2013-01-0820723901ND
2013-01-0820724601ND
2013-04-1021592201ND
2013-04-1021591101ND
2013-04-1021591501ND
2013-04-1021592101ND
2013-04-1021592001ND
2013-07-0922820201ND
2013-07-0922820101ND
2013-07-0922819301ND
2013-10-0823524601ND
2013-10-0823524501ND
2013-10-0823523701ND
2014-01-0824411901ND
2014-01-0824411801ND
2014-01-0824411201ND
2014-04-0225341701ND
2014-04-0225341601ND
2014-04-0325341001ND
2014-04-0325341801ND
2014-06-2525339701ND
2014-07-0826115101ND
2014-07-0826115901ND
2014-07-0826116001ND
2014-10-0627103801ND
2014-10-0627104801ND
2014-10-0627104901ND
2015-01-0812283014ND
2015-01-0812283060ND
2015-01-0812283058ND
2015-04-0912628947ND
2015-04-0912628855ND
2015-04-0912628945ND
2015-04-0912628943ND
2015-04-0912628920ND
2015-07-1313008736ND
2015-07-1313008759ND
2015-09-1613260285ND
2015-10-0613385348ND
2015-10-0613385302ND
2015-10-0613385346ND
2016-01-1213749045ND
2016-01-1213749049ND
2016-01-1213749047ND
2016-04-0514097817ND
2016-04-0514097905ND
2016-04-0514097909ND
2016-04-0514097882ND
2016-04-0514097907ND
2016-07-1214564474ND
2016-07-1214564472ND
2016-07-1214564476ND
2016-10-0415070972ND
2016-10-0415070968ND
2016-10-0415070970ND
2017-01-1015512519ND
2017-01-1015512515ND
2017-01-1015512517ND
2017-04-1115931673ND
2017-04-1115931676ND
2017-04-1115931536ND
2017-04-1115931650ND
2017-07-1216408225ND
2017-07-1216408223ND
2017-10-1016875622ND
2017-12-0717157395ND