Know Your Environment. Protect Your Health.

Nitrate

Prairie Grove Water Supply Corporation

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)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0332 ppm220.0234 ppm - 0.0430 ppm
20190.0276 ppm220.0215 ppm - 0.0337 ppm
20200.0384 ppm220.0323 ppm - 0.0445 ppm
20210.0402 ppm110.0402 ppm
20220.0406 ppm110.0406 ppm
20230.0392 ppm110.0392 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
2018-04-24Q18165580010.0430 ppm
2018-04-24Q18165580090.0234 ppm
2019-02-07Q19059200080.0337 ppm
2019-05-20Q19266680010.0215 ppm
2020-02-04Q20045120050.0323 ppm
2020-05-05Q20178720110.0445 ppm
2021-02-04Q21035190050.0402 ppm
2022-01-12Q22010860040.0406 ppm
2023-07-19Q23284440070.0392 ppm