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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Linville-haile Water System

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.

MORE ABOUT THIS CONTAMINANT

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
2015ND60ND
20160.0147 ppm62ND - 0.0440 ppm
2017ND60ND
2018ND60ND
2019ND60ND

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
2014-11-17AD99778ND
2014-11-17AD99776ND
2014-11-17AD99778ND
2014-11-17AD99777ND
2014-11-17AD99776ND
2014-11-17AD99777ND
2015-03-3035181779001ND
2015-03-3035181779002ND
2015-03-3035181779003ND
2015-03-3035181779003ND
2015-03-3035181779002ND
2015-03-3035181779001ND
2016-12-0635282272016ND
2016-12-0635282272015ND
2016-12-06352822720140.0440 ppm
2016-12-06352822720140.0440 ppm
2016-12-0635282272015ND
2016-12-0635282272016ND
2017-11-1735360198003ND
2017-11-1735360198002ND
2017-11-1735360198001ND
2017-11-1735360198001ND
2017-11-1735360198003ND
2017-11-1735360198002ND
2018-03-0735378987002ND
2018-03-0735378987003ND
2018-03-0735378987001ND
2018-03-0735378987001ND
2018-03-0735378987002ND
2018-03-0735378987003ND
2019-12-1635519624001ND
2019-12-1635519624003ND
2019-12-1635519624002ND
2019-12-1635519624001ND
2019-12-1635519624003ND
2019-12-1635519624002ND