Know Your Environment. Protect Your Health.

Nitrate

Afton 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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0243 ppm330.0149 ppm - 0.0332 ppm
20190.0353 ppm220.0343 ppm - 0.0363 ppm
20200.0254 ppm220.0229 ppm - 0.0279 ppm
20210.0374 ppm220.0311 ppm - 0.0437 ppm
20220.0272 ppm220.0261 ppm - 0.0282 ppm
20230.0260 ppm220.0236 ppm - 0.0283 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
2018-10-30Q18438800010.0247 ppm
2018-10-30Q18438800020.0332 ppm
2018-10-30Q18438800030.0149 ppm
2019-11-25Q19782710010.0363 ppm
2019-11-25Q19782710020.0343 ppm
2020-07-30Q20299000010.0229 ppm
2020-07-30Q20299000020.0279 ppm
2021-03-04Q21058040010.0437 ppm
2021-03-04Q21058040020.0311 ppm
2022-06-13Q22163800010.0261 ppm
2022-06-13Q22163800020.0282 ppm
2023-10-12Q23435560010.0236 ppm
2023-10-12Q23435560020.0283 ppm