Know Your Environment. Protect Your Health.

Nitrate and nitrite

Monroeville Water Works

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

6

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.200 ppm110.200 ppm
20190.350 ppm110.350 ppm
2020ND10ND
20210.310 ppm110.310 ppm
20220.300 ppm110.300 ppm
20230.260 ppm110.260 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

ppm = parts per million

All test results

Date Lab ID Result
2018-10-0518100908001AN0.200 ppm
2019-09-2519092778001N0.350 ppm
2020-09-2420092721001NND
2021-09-1321091084-001A0.310 ppm
2022-09-06124386-10.300 ppm
2023-09-07162281-40.260 ppm