Know Your Environment. Protect Your Health.

Nitrate and nitrite

Glen of Robin Hood

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND20ND
2020ND30ND
2021ND30ND
2022ND30ND
2023ND30ND

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
2018-06-26AJ92722ND
2018-06-26AJ92723ND
2018-06-26AJ92700ND
2019-08-12AK26281ND
2019-08-12AK26282ND
2020-12-15AK66546ND
2020-12-15AK66555ND
2020-12-15AK66560ND
2021-07-20AK80913ND
2021-07-20AK80916ND
2021-07-20AK80915ND
2022-05-17AL01455ND
2022-05-17AL01465ND
2022-05-17AL01477ND
2023-03-06AL26893ND
2023-03-06AL26894ND
2023-03-06AL26899ND