Know Your Environment. Protect Your Health.

Nitrate and nitrite

Little Hocking Water/sewer Association

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
20180.760 ppm110.760 ppm
20190.560 ppm110.560 ppm
20200.820 ppm110.820 ppm
20210.770 ppm110.770 ppm
20220.650 ppm110.650 ppm
20230.530 ppm110.530 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
2018-07-19A1806230580.760 ppm
2019-08-159H02815-010.560 ppm
2020-08-200H03226-030.820 ppm
2021-08-191H03326-010.770 ppm
2022-08-112H02412-020.650 ppm
2023-07-203G03487-010.530 ppm