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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Walnutport Mobile Court

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND40ND

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
2014-01-081312-00953ND
2014-04-021403-00819ND
2014-07-021406-01362ND
2014-10-011409-00942ND
2015-01-0712325509ND
2015-04-0112671382ND
2015-07-0113053538ND
2015-10-0713430202ND
2016-02-0413908215ND
2016-04-0614153480ND
2016-07-0614624938ND
2016-10-0515124984ND
2017-01-0415564088ND
2017-04-0515991292ND
2017-07-0516463811ND
2017-10-0416927351ND
2018-01-031712-01224ND
2018-04-058008568-02ND
2018-07-128016675-02ND
2018-10-118027175-02ND
2019-01-249002048-02ND
2019-04-119007599-02ND
2019-08-019019116-02ND
2019-11-079035035-02ND