Know Your Environment. Protect Your Health.

Nitrate

Gallatin Water Department

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.463 ppm110.463 ppm
20190.448 ppm110.448 ppm
20200.466 ppm110.466 ppm
20210.297 ppm110.297 ppm
20220.395 ppm220.395 ppm
20230.380 ppm330.380 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 Result
2018-02-140.463 ppm
2019-02-060.448 ppm
2020-02-050.466 ppm
2021-02-050.297 ppm
2022-02-070.395 ppm
2022-02-070.395 ppm
2023-02-060.380 ppm
2023-02-060.380 ppm
2023-02-060.380 ppm