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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Liberty Utilities

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

18

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
2019ND30ND

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL) 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2014-01-22140230012ND
2014-01-22140230013ND
2014-01-27140300033ND
2015-01-14Y150150016ND
2015-01-14Y150150015ND
2015-01-14Y150150014ND
2016-01-19Y160250022ND
2016-01-19Y160250023ND
2016-01-19Y160250024ND
2017-01-17Y170190016ND
2017-01-17Y170190018ND
2017-01-17Y170190017ND
2018-01-22Y180250021ND
2018-01-22Y180250024ND
2018-01-22Y180250020ND
2019-02-06Y190380038ND
2019-02-06Y190380036ND
2019-02-06Y190380037ND