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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Colchester Commons

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
2014-07-29BG83660NOXND
2014-07-29BG83661NOXND
2014-07-29BG83659NOXND
2015-04-24BJ07683NOXND
2015-04-24BJ07684NOXND
2015-04-24BJ07685NOXND
2016-03-24BK87904NOXND
2016-03-24BK87905NOXND
2016-03-24BK87906NOXND
2017-01-12BX21457NOXND
2017-04-07BY00694NOXND
2017-10-10BZ18334NOXND
2018-04-27CA37955NOXND
2018-04-27CA37956NOXND
2018-04-27CA37957NOXND
2019-10-21CE44554ND
2019-10-21CE44555ND
2019-10-21CE44559ND
2019-10-21CE44560ND
2019-10-21CE44556ND