Know Your Environment. Protect Your Health.

Nitrate and nitrite

Osseo Waterworks

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
20210.268 ppm82ND - 1.07 ppm
2022N/A00N/A
20230.611 ppm220.0210 ppm - 1.20 ppm

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
2021-03-03549919001ND
2021-03-03549920001ND
2021-03-03549919001ND
2021-03-03549920001ND
2021-03-09550900001ND
2021-03-095508970011.07 ppm
2021-03-09550900001ND
2021-03-095508970011.07 ppm
2023-03-2223C0748-020.0210 ppm
2023-03-2223C0748-011.20 ppm