Know Your Environment. Protect Your Health.

Nitrate and nitrite

Brookstone S/d

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.367 ppm31ND - 1.10 ppm
2019ND10ND
20200.467 ppm31ND - 1.40 ppm
20210.433 ppm31ND - 1.30 ppm
2022ND30ND
20230.467 ppm31ND - 1.40 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
2018-01-16CA18218-02ND
2018-01-25CB01153-011.10 ppm
2018-07-11CB08124-01ND
2019-07-29CC10527-01ND
2020-01-21CC19909-011.40 ppm
2020-01-21CC19909-02ND
2020-07-14CD08240-01ND
2021-01-19CD18540-011.30 ppm
2021-02-02CE01540-01ND
2021-07-06CE07495-01ND
2022-01-18CE17733-01ND
2022-01-24CF01034-01ND
2022-07-27CF06985-01ND
2023-01-24752-1762-11.40 ppm
2023-01-24752-1762-2ND
2023-07-1937729_23-38646AND