Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Nitrite

Ozark Utilities Board

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.

MORE ABOUT THIS CONTAMINANT

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
2015ND90ND
2016N/A00N/A
2017N/A00N/A
2018ND80ND
2019ND80ND

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
2014-02-20AA88514ND
2014-02-20AA88513ND
2014-02-20AA88515ND
2014-02-20AA88512ND
2014-04-17AA89205ND
2014-04-17AA89204ND
2014-04-17AA89203ND
2014-11-06AA92635ND
2014-11-06AA92633ND
2014-11-06AA92634ND
2015-03-04AB02427ND
2015-03-04AB02425ND
2015-03-04AB02424ND
2015-06-02AB04707ND
2015-06-02AB04706ND
2015-06-02AB04705ND
2015-06-02AB04704ND
2015-06-02AB04703ND
2015-06-02AB04708ND
2018-06-13AB27739ND
2018-06-13AB27737ND
2018-06-13AB27741ND
2018-06-13AB27738ND
2018-06-13AB27743ND
2018-06-13AB27742ND
2018-06-13AB27740ND
2018-06-13AB27744ND
2019-06-19AB36106ND
2019-06-19AB36105ND
2019-06-19AB36104ND
2019-06-19AB36103ND
2019-08-27AB37949ND
2019-08-27AB37948ND
2019-08-27AB37947ND
2019-08-27AB37946ND