Know Your Environment. Protect Your Health.

Nitrate and nitrite

White Bird Community, The

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.910 ppm110.910 ppm
20190.720 ppm110.720 ppm
20200.620 ppm110.620 ppm
20210.750 ppm110.750 ppm
20220.790 ppm110.790 ppm
20230.770 ppm110.770 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
2018-12-20H18120454-001A0.910 ppm
2019-02-19H19020248-001B0.720 ppm
2020-02-26H20030054-001A0.620 ppm
2021-12-20H21120587-001A0.750 ppm
2022-02-02H22020153-001A0.790 ppm
2023-02-08H23020259-001A0.770 ppm