Know Your Environment. Protect Your Health.

Nitrate and nitrite

Ten Mile and Pleasant Valley Wua

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
20181.05 ppm111.05 ppm
20190.243 ppm110.243 ppm
20200.198 ppm110.198 ppm
20210.252 ppm110.252 ppm
20220.415 ppm110.415 ppm
20230.662 ppm110.662 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
2018-01-081801097-011.05 ppm
2019-01-091901156-010.243 ppm
2020-01-072001073-010.198 ppm
2021-01-072101100-010.252 ppm
2022-01-052201077-010.415 ppm
2023-01-062301141-010.662 ppm