Know Your Environment. Protect Your Health.

Nitrate

North Hunt Special Utility District

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

25

Samples

0

Samples exceeding legal limit (MCL)

17

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.183 ppm440.0194 ppm - 0.401 ppm
20190.420 ppm43ND - 0.629 ppm
20200.393 ppm550.0105 ppm - 0.552 ppm
20210.512 ppm43ND - 0.972 ppm
20220.202 ppm43ND - 0.425 ppm
20230.297 ppm43ND - 0.632 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

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2018-06-04Q18220500090.0275 ppm
2018-06-04Q18220500050.0194 ppm
2018-08-09Q18319730030.401 ppm
2018-08-09Q18319730040.283 ppm
2019-03-12Q19102370030.538 ppm
2019-03-12Q19102370040.629 ppm
2019-05-28Q19287500050.512 ppm
2019-05-28Q1928750006ND
2020-05-07Q20180550030.470 ppm
2020-05-07Q20180550040.387 ppm
2020-11-23Q20466210240.552 ppm
2020-11-23Q20466210190.0105 ppm
2020-11-23Q20466210180.545 ppm
2021-02-08Q21037000070.387 ppm
2021-02-08Q2103700008ND
2021-02-08Q21037000110.688 ppm
2021-02-08Q21037000120.972 ppm
2022-02-10Q22049370040.425 ppm
2022-11-29Q2235351002ND
2022-11-29Q22353510030.0781 ppm
2022-11-29Q22353510040.305 ppm
2023-03-13Q23096680010.632 ppm
2023-03-13Q23096680020.285 ppm
2023-03-13Q2309668006ND
2023-03-13Q23096680170.269 ppm