Know Your Environment. Protect Your Health.

Nitrate and nitrite

Stagecoach 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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.333 ppm31ND - 1.000 ppm
2019N/A00N/A
20200.367 ppm31ND - 1.10 ppm
2021ND30ND
20220.333 ppm31ND - 1.000 ppm
20230.733 ppm32ND - 1.10 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
2018-02-21CA18459-011.000 ppm
2018-02-26CA18458-01ND
2018-02-26CA18458-02ND
2020-02-18CC20129-01ND
2020-02-18CC20131-011.10 ppm
2020-02-18CD02776-01ND
2021-02-10CD18778-01ND
2021-02-10CD18778-02ND
2021-02-10CD18779-01ND
2022-02-03CE17975-011.000 ppm
2022-02-03CE17975-02ND
2022-02-03CE17976-01ND
2023-02-08752-2603-11.10 ppm
2023-02-08752-2603-2ND
2023-02-08752-2614-11.10 ppm