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
2018ND20ND
2019ND20ND
2020ND20ND
2021ND20ND
2022ND20ND
2023ND20ND

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
2018-04-16AJ87518ND
2018-04-16AJ87521ND
2019-12-30AK38988ND
2019-12-30AK38989ND
2020-03-24AK43729ND
2020-03-24AK43730ND
2021-03-17AK71463ND
2021-03-17AK71464ND
2022-03-28AK97991ND
2022-03-28AK97995ND
2023-10-30AL48230ND
2023-10-30AL48233ND