Know Your Environment. Protect Your Health.

Nitrate

Parkwood Green

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)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019N/A00N/A
20200.196 ppm21ND - 0.392 ppm
20211.71 ppm330.219 ppm - 2.45 ppm
20220.476 ppm21ND - 0.952 ppm
20230.927 ppm330.555 ppm - 1.67 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
2018-08-21LLI00488ND
2018-08-21LLI00489ND
2018-12-03LLI17527ND
2020-09-02ND
2020-09-020.392 ppm
2021-08-170.219 ppm
2021-09-142.45 ppm
2021-09-142.45 ppm
2022-08-190.952 ppm
2022-08-19ND
2023-08-081.67 ppm
2023-08-080.555 ppm
2023-08-080.555 ppm