Know Your Environment. Protect Your Health.

Nitrate

City of Clyde

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

12

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.108 ppm220.0769 ppm - 0.139 ppm
20190.183 ppm220.106 ppm - 0.260 ppm
20200.377 ppm220.149 ppm - 0.604 ppm
20210.232 ppm220.157 ppm - 0.306 ppm
20220.135 ppm220.129 ppm - 0.140 ppm
20230.305 ppm220.258 ppm - 0.351 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

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2018-03-08Q18097050040.139 ppm
2018-09-19Q18373530060.0769 ppm
2019-03-20Q19115890010.106 ppm
2019-03-20Q19115890080.260 ppm
2020-03-05Q20083070070.604 ppm
2020-03-05Q20083070080.149 ppm
2021-01-28Q21022650040.306 ppm
2021-05-27Q21137470030.157 ppm
2022-01-12Q22011500050.129 ppm
2022-04-06Q22107120040.140 ppm
2023-02-23Q23076610010.351 ppm
2023-02-23Q23076610020.258 ppm