Know Your Environment. Protect Your Health.

Nitrate and nitrite

Nininger Waterworks

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.

 

5

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20190.378 ppm110.378 ppm
20200.270 ppm110.270 ppm
20210.220 ppm110.220 ppm
20220.530 ppm110.530 ppm
20230.370 ppm110.370 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
2019-02-0519020428-01A0.378 ppm
2020-04-1773246520030.270 ppm
2021-12-07731010100010.220 ppm
2022-12-07926405620010.530 ppm
2023-12-0592702059001NIT0.370 ppm