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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Northern Kentucky Water District

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

 

29

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND50ND
2015ND50ND
2016ND50ND
2017ND30ND
2018ND50ND
2019ND60ND

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
2014-05-0104301430CND
2014-05-0104301434CND
2014-05-0104301412CND
2014-10-2210211416CND
2014-10-2210211426CND
2015-05-1205121529CND
2015-05-1205121507CND
2015-05-1205121525CND
2015-10-0710061528CND
2015-10-0710061546CND
2016-05-1105091617CND
2016-05-1105091635CND
2016-10-1910181626CND
2016-10-1910181629CND
2016-10-1910181616CND
2017-04-1904181724CND
2017-04-1904181721CND
2017-04-1904181711CND
2018-04-2504241801CND
2018-04-2504241811CND
2018-08-3008291827CND
2018-10-2410241801CND
2018-10-2410241811CND
2019-04-0304021928CND
2019-04-0304021946CND
2019-04-0304021950CND
2019-10-2310231905CND
2019-10-2310231915CND
2019-10-2310231918CND