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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Darbonne Ws South

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

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
20150.00900 ppm62ND - 0.0270 ppm
2016ND60ND
2017ND60ND
2018ND40ND
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
2014-12-01AE00117ND
2014-12-01AE00114ND
2014-12-01AE00117ND
2014-12-01AE00115ND
2014-12-01AE00114ND
2014-12-01AE00115ND
2015-05-19351896590080.0270 ppm
2015-05-19351896590080.0270 ppm
2015-05-1935189659011ND
2015-05-1935189659012ND
2015-05-1935189659012ND
2015-05-1935189659011ND
2016-09-1435265950005ND
2016-09-1435265950003ND
2016-09-1435265950004ND
2016-09-1435265950005ND
2016-09-1435265950004ND
2016-09-1435265950003ND
2017-10-2035343702001ND
2017-10-2035343702002ND
2017-10-2035343702001ND
2017-10-2035343702002ND
2017-11-0635346874001ND
2017-11-0635346874001ND
2018-04-2335388789002ND
2018-04-2335388789001ND
2018-04-2335388789001ND
2018-04-2335388789002ND
2019-08-0735488807001ND
2019-08-0735488807003ND
2019-08-0735488807002ND
2019-08-0735488807001ND
2019-08-0735488807003ND
2019-08-0735488807002ND