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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Town of Tullos 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

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
2015ND20ND
2016ND60ND
2017ND60ND
2018ND20ND
20190.0400 ppm220.0400 ppm

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
2014-10-27AD98972ND
2014-10-27AD98962ND
2014-10-27AD98967ND
2014-10-27AD98972ND
2014-10-27AD98967ND
2014-10-27AD98962ND
2015-11-0335215208010ND
2015-11-0335215208010ND
2016-10-2735273175019ND
2016-10-2735273175023ND
2016-10-2735273175017ND
2016-10-2735273175017ND
2016-10-2735273175019ND
2016-10-2735273175023ND
2017-10-1735342595003ND
2017-10-1735342595002ND
2017-10-1735342595001ND
2017-10-1735342595001ND
2017-10-1735342595002ND
2017-10-1735342595003ND
2018-08-2135413711001ND
2018-08-2135413711001ND
2019-06-10354757290020.0400 ppm
2019-06-10354757290020.0400 ppm