Know Your Environment. Protect Your Health.

Nitrate

Wylie Northeast 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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.418 ppm110.418 ppm
20190.515 ppm110.515 ppm
20200.341 ppm110.341 ppm
20210.599 ppm220.519 ppm - 0.679 ppm
20220.366 ppm550.130 ppm - 0.638 ppm
20230.331 ppm550.0645 ppm - 0.790 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
2018-10-19Q18420270010.418 ppm
2019-11-07Q19761180010.515 ppm
2020-11-12Q20446010030.341 ppm
2021-01-28Q21023110010.679 ppm
2021-12-06Q21337860010.519 ppm
2022-01-25Q22024520010.638 ppm
2022-05-23Q22149490010.325 ppm
2022-05-23Q22149490020.334 ppm
2022-09-15Q22276870010.130 ppm
2022-11-10Q22339760010.403 ppm
2023-02-22Q23074160010.790 ppm
2023-06-01Q23205330010.124 ppm
2023-08-10Q23332430010.0859 ppm
2023-08-10Q23332430020.0645 ppm
2023-11-08Q23480640010.591 ppm