Know Your Environment. Protect Your Health.

Nitrate and nitrite

Harris Farms South #101-144

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.

 

7

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.630 ppm110.630 ppm
20190.690 ppm110.690 ppm
20200.880 ppm110.880 ppm
2021ND20ND
2022ND10ND
20230.420 ppm110.420 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
2018-01-09CA1009028_001_001-2018010910000.630 ppm
2019-01-15CA1009028_001_001-2019011509000.690 ppm
2020-01-14CA1009028_001_001-2020011413450.880 ppm
2021-01-12CA1009028_001_001-202101120910ND
2021-01-12CA1009028_001_001-202101120910ND
2022-01-11CA1009028_001_001-202201110937ND
2023-01-10CA1009028_001_001-2023011009180.420 ppm