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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

Lehigh County Authority Allentown Division

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND30ND
2014ND40ND
2015ND20ND
2016ND30ND
2017ND30ND

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
2012-02-16L4002335-1ND
2012-02-16L4002368-1ND
2012-04-12L4094666-1ND
2012-07-12L4204605-1ND
2012-11-07L4324228-1ND
2013-02-08L4430652-1ND
2013-02-08L4430704-1ND
2013-05-16L4527084-1ND
2014-03-1814031667-01ND
2014-03-1814031667-02ND
2014-08-0514080495-01ND
2014-10-1314093089-01ND
2015-03-1012549248ND
2015-03-1012549250ND
2016-03-2314020072ND
2016-03-2314020068ND
2016-03-2314020070ND
2017-03-2115835608ND
2017-03-2115835604ND
2017-03-2115835606ND