Know Your Environment. Protect Your Health.

Nitrate

City of Hallettsville

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND30ND
2021ND30ND
2022ND30ND
2023ND30ND

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
2018-09-19AE40585ND
2018-09-19AE40607ND
2018-09-19AE40582ND
2019-08-22AE80065ND
2019-08-22AE80087ND
2019-08-22AE80089ND
2020-05-19AF11729ND
2020-05-19AF11731ND
2020-05-19AF11732ND
2021-06-10AF57303ND
2021-06-10AF57343ND
2021-06-10AF57313ND
2022-08-04AG07744ND
2022-08-04AG07745ND
2022-08-04AG07748ND
2023-03-06AG31544ND
2023-03-06AG31564ND
2023-03-06AG31565ND