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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Connecticut Correctional Institute

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
2014ND30ND
2015ND30ND
2016ND30ND
2017ND30ND
2018ND30ND
2019ND50ND

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
2014-01-22E401E00-1NOXND
2014-04-10E404A55-1NOXND
2014-04-10E404A56-1NOXND
2015-01-06E501419-1NOXND
2015-04-17E504G26-2NOXND
2015-06-25E506V53-1NOXND
2016-02-17E602G94-1NOXND
2016-04-26E604R65-1NOXND
2016-05-17E605K81-1NOXND
2017-02-07E702627-1NOXND
2017-04-25D7D1851-01NOXND
2017-05-09D7E0943-01NOXND
2018-01-16308607GEND
2018-01-30309000GEND
2018-01-30309007GEND
2019-01-22CC32920ND
2019-01-29CC35679ND
2019-01-29CC35682ND
2019-12-10330469GEND
2019-12-10330470GEND