Know Your Environment. Protect Your Health.

Nitrate and nitrite

City of Clyde

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)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.139 ppm110.139 ppm
20190.260 ppm110.260 ppm
20200.604 ppm110.604 ppm
20210.306 ppm110.306 ppm
20220.140 ppm110.140 ppm
20230.694 ppm110.694 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
2018-03-08Q18097050040.139 ppm
2019-03-20Q19115890080.260 ppm
2020-03-05Q20083070070.604 ppm
2021-01-28Q21022650040.306 ppm
2022-04-06Q22107120040.140 ppm
2023-02-23Q23076610010.694 ppm