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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Franklin Water Systems 3

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND120ND
2016ND20ND
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

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
2014-03-24Q1409514002ND
2014-03-24Q1409514001ND
2014-06-24Q1423214006ND
2014-06-24Q1423214005ND
2014-09-10Q1443324002ND
2014-09-10Q1443324001ND
2014-12-18Q1460543002ND
2014-12-18Q1460543001ND
2015-03-25Q1511062001ND
2015-03-25Q1511062003ND
2015-03-25Q1511062002ND
2015-06-23Q1523303003ND
2015-06-23Q1523303002ND
2015-06-23Q1523303001ND
2015-09-17Q1536296003ND
2015-09-17Q1536296002ND
2015-09-17Q1536296001ND
2015-11-18Q1545492003ND
2015-11-18Q1545492002ND
2015-11-18Q1545492001ND
2016-12-13Q1654192018ND
2016-12-13Q1654192019ND