Know Your Environment. Protect Your Health.

Nitrate and nitrite

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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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND30ND
2021ND10ND
2022ND10ND
2023ND10ND

ppm = parts per million

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.14 ppm

The EWG 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
2018-04-19AD18275ND
2018-04-19AD18276ND
2018-04-19AD18277ND
2019-04-17AD46409ND
2019-04-17AD46410ND
2019-04-17AD46411ND
2020-04-242004057ND
2020-04-242004058ND
2020-04-242004059ND
2021-11-222103538ND
2022-02-142122161ND
2023-01-182222952ND