Know Your Environment. Protect Your Health.

Nitrate and nitrite

Maysville PWS

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)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.110 ppm110.110 ppm
20190.830 ppm110.830 ppm
20200.483 ppm110.483 ppm
20210.730 ppm110.730 ppm
20220.0970 ppm110.0970 ppm
20230.309 ppm110.309 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
2018-03-07AD166380.110 ppm
2019-03-19AD406630.830 ppm
2020-03-2420029370.483 ppm
2021-03-2321016130.730 ppm
2022-03-1422028060.0970 ppm
2023-03-2823018590.309 ppm