Know Your Environment. Protect Your Health.

Nitrate and nitrite

Crawford County Water System

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.735 ppm220.700 ppm - 0.770 ppm
20190.675 ppm220.660 ppm - 0.690 ppm
20200.310 ppm220.310 ppm
20210.310 ppm220.310 ppm
20220.335 ppm220.330 ppm - 0.340 ppm
20230.770 ppm220.720 ppm - 0.820 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
2018-12-11AK079040.770 ppm
2018-12-11AK079070.700 ppm
2019-12-11AK382270.690 ppm
2019-12-11AK382280.660 ppm
2020-12-09AK662140.310 ppm
2020-12-09AK662160.310 ppm
2021-12-06AK918960.310 ppm
2021-12-06AK918970.310 ppm
2022-12-07AL218750.330 ppm
2022-12-07AL218770.340 ppm
2023-12-04AL502520.820 ppm
2023-12-04AL502530.720 ppm