Know Your Environment. Protect Your Health.

Nitrate and nitrite

North Hunt Special Utility District

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.636 ppm220.582 ppm - 0.690 ppm
20191.06 ppm220.709 ppm - 1.41 ppm
20200.696 ppm330.593 ppm - 0.860 ppm
20210.992 ppm220.836 ppm - 1.15 ppm
20220.793 ppm43ND - 1.96 ppm
20231.11 ppm220.974 ppm - 1.25 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
2018-08-09Q18319730030.690 ppm
2018-08-09Q18319730040.582 ppm
2019-03-12Q19102370030.709 ppm
2019-03-12Q19102370041.41 ppm
2020-05-07Q20180550030.860 ppm
2020-05-07Q20180550040.636 ppm
2020-11-23Q20466210240.593 ppm
2021-02-08Q21037000110.836 ppm
2021-02-08Q21037000121.15 ppm
2022-02-10Q22049370041.13 ppm
2022-11-29Q2235351002ND
2022-11-29Q22353510030.0781 ppm
2022-11-29Q22353510041.96 ppm
2023-03-13Q23096680010.974 ppm
2023-03-13Q23096680021.25 ppm