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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

Penn State Univ.

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.

 

161

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND170ND
2013ND280ND
2014ND390ND
2015ND350ND
2016ND270ND
2017ND150ND

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
2012-01-112A11054ND
2012-01-112A11055ND
2012-01-112A11054ND
2012-04-102D10034ND
2012-04-102D10032ND
2012-04-102D10034ND
2012-05-162E16052ND
2012-05-162E16047ND
2012-05-162E16052ND
2012-06-132F13082ND
2012-06-132F13085ND
2012-11-142K14103ND
2012-11-142K14103ND
2012-11-142K14103ND
2012-12-122L12132ND
2012-12-122L12141ND
2012-12-122L12132ND
2013-01-163A16080ND
2013-01-163A16077ND
2013-02-133B13070ND
2013-02-133B13069ND
2013-03-143C14062ND
2013-03-143C14067ND
2013-04-163D16078ND
2013-04-163D16079ND
2013-05-143E14110ND
2013-05-143E14111ND
2013-06-193F19020ND
2013-06-193F19038ND
2013-07-163G16031ND
2013-07-163G16034ND
2013-08-143H14088ND
2013-08-143H14065ND
2013-08-143H14088ND
2013-09-183I18061ND
2013-09-183I18062ND
2013-09-183I18061ND
2013-10-163J16032ND
2013-10-163J16040ND
2013-10-163J16032ND
2013-11-193K19048-06ND
2013-11-193K19040-06ND
2013-12-123L12046-07ND
2013-12-123L12104-06ND
2013-12-123L12046-06ND
2014-01-234A23025-07ND
2014-01-234A23033-06ND
2014-01-234A23025-06ND
2014-02-204B20042-07ND
2014-02-204B20041-07ND
2014-02-204B20042-06ND
2014-03-114C11016-07ND
2014-03-114C11027-07ND
2014-03-114C11016-06ND
2014-04-094D09031-01ND
2014-04-094D09041-06ND
2014-04-094D09036-01ND
2014-04-094D09039-07ND
2014-04-094D09037-01ND
2014-04-094D09041-05ND
2014-05-144E14081-05ND
2014-05-144E14075-07ND
2014-05-144E14081-04ND
2014-06-114F11107-05ND
2014-06-114F11080-07ND
2014-06-114F11107-04ND
2014-07-154G15039-05ND
2014-07-154G15039-04ND
2014-07-244G24085-01ND
2014-08-134H13112-06ND
2014-08-134H13115-07ND
2014-08-134H13112-05ND
2014-09-174I17153-06ND
2014-09-174I17154-07ND
2014-09-174I17153-05ND
2014-10-154J15042-06ND
2014-10-154J15044-07ND
2014-10-154J15042-05ND
2014-11-204K20058-07ND
2014-11-204K20063-06ND
2014-11-204K20058-06ND
2014-12-164L16042-07ND
2014-12-164L16040-07ND
2014-12-164L16042-06ND
2015-01-2112333079ND
2015-01-2112333082ND
2015-01-2112333080ND
2015-02-1712446987ND
2015-02-1712446984ND
2015-02-1712446988ND
2015-03-1712561746ND
2015-03-1712561747ND
2015-03-1812561749ND
2015-04-2812680439ND
2015-04-2812680440ND
2015-05-2012802706ND
2015-05-2012802701ND
2015-05-2012802705ND
2015-06-1712936435ND
2015-06-1712936432ND
2015-06-1712936436ND
2015-07-1413062405ND
2015-07-1413062408ND
2015-07-1413062406ND
2015-08-1213185090ND
2015-08-1213185086ND
2015-08-1213185091ND
2015-09-1613314598ND
2015-09-1613314595ND
2015-09-1613314599ND
2015-10-1513439554ND
2015-10-1513439559ND
2015-10-1513439555ND
2015-11-1113561172ND
2015-11-1113561148ND
2015-11-1113561196ND
2015-12-1013681454ND
2015-12-1013681501ND
2015-12-1013681455ND
2016-01-2613801540ND
2016-01-2613801492ND
2016-01-2613801516ND
2016-02-2313917079ND
2016-02-2313917054ND
2016-02-2313917080ND
2016-03-1614032214ND
2016-03-1614032191ND
2016-03-1614032168ND
2016-04-2014163565ND
2016-04-2014163540ND
2016-04-2014163566ND
2016-05-1814312873ND
2016-05-1814312920ND
2016-05-1814312874ND
2016-06-2114471196ND
2016-06-2114471245ND
2016-06-2114471197ND
2016-07-1914636438ND
2016-07-1914636412ND
2016-07-1914636439ND
2016-08-2314804519ND
2016-08-2314804469ND
2016-08-2314804494ND
2016-09-2814975854ND
2016-09-2814975903ND
2016-09-2814975855ND
2017-01-1715573210ND
2017-01-1715573211ND
2017-01-1815573184ND
2017-02-2315709623ND
2017-02-2315709624ND
2017-03-2315850689ND
2017-03-2615850591ND
2017-04-1816001555ND
2017-04-1816001556ND
2017-05-2416159230ND
2017-06-2816321132ND
2017-08-0316629353ND
2017-09-2016787154ND
2017-10-3116937309ND
2017-12-1917217463ND