Know Your Environment. Protect Your Health.

Nitrate

Chisholm Hills Estates

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)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0827 ppm220.0173 ppm - 0.148 ppm
20190.0718 ppm220.0226 ppm - 0.121 ppm
20200.0509 ppm220.0252 ppm - 0.0766 ppm
20210.0453 ppm220.0195 ppm - 0.0711 ppm
20220.170 ppm220.0436 ppm - 0.297 ppm
20230.161 ppm220.0443 ppm - 0.277 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
2018-09-18Q18370770070.148 ppm
2018-09-18Q18370770080.0173 ppm
2019-05-21Q19271660010.121 ppm
2019-05-21Q19271660020.0226 ppm
2020-11-18Q20457460050.0766 ppm
2020-11-18Q20457460060.0252 ppm
2021-06-29Q21169750150.0711 ppm
2021-06-29Q21169750160.0195 ppm
2022-11-15Q22343330030.297 ppm
2022-11-15Q22343330040.0436 ppm
2023-07-20Q23287250010.0443 ppm
2023-09-06Q23384620030.277 ppm