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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

Rra Guthrie Dumont Water System

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013N/A00N/A
2014ND40ND
2015ND20ND
2016N/A00N/A
2017N/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
2012-02-21AB81648ND
2012-05-29AB91265ND
2012-08-14AB98570ND
2012-11-271211825001ND
2014-02-20Q1405601002ND
2014-05-14Q1416223002ND
2014-07-29Q1431650001ND
2014-11-18Q1456497001ND
2015-08-11Q1531433001ND
2015-10-20Q1541004001ND