Know Your Environment. Protect Your Health.

Nitrate

North Texas Municipal Water District Wylie Water Treatment Plant

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.

 

34

Samples

0

Samples exceeding legal limit (MCL)

28

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.241 ppm440.0222 ppm - 0.503 ppm
20190.520 ppm660.0831 ppm - 0.772 ppm
20200.525 ppm660.266 ppm - 0.827 ppm
20210.539 ppm660.110 ppm - 0.802 ppm
20220.302 ppm660.158 ppm - 0.439 ppm
20230.390 ppm660.0671 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
2018-01-23Q18025540040.0222 ppm
2018-09-17Q18368330050.266 ppm
2018-09-17Q18368330060.174 ppm
2018-11-26Q18476470020.503 ppm
2019-01-15Q19020440080.578 ppm
2019-01-15Q19020440090.772 ppm
2019-01-15Q19020440240.737 ppm
2019-06-12Q19364290010.304 ppm
2019-08-02Q19507210050.0831 ppm
2019-12-17Q19803210010.646 ppm
2020-03-10Q20092790060.827 ppm
2020-03-10Q20092790070.705 ppm
2020-03-10Q20092790080.720 ppm
2020-05-19Q20200830030.340 ppm
2020-09-10Q20361020050.266 ppm
2020-11-12Q20446000010.292 ppm
2021-01-28Q21023100100.802 ppm
2021-01-28Q21023100090.754 ppm
2021-01-28Q21023100080.682 ppm
2021-04-28Q21107190010.529 ppm
2021-09-23Q21261180010.110 ppm
2021-11-19Q21325750010.358 ppm
2022-03-22Q22091380140.347 ppm
2022-03-22Q22091380150.343 ppm
2022-03-22Q22091380160.342 ppm
2022-06-15Q22166940010.158 ppm
2022-09-15Q22276850010.180 ppm
2022-11-10Q22339750010.439 ppm
2023-02-22Q23074130010.790 ppm
2023-02-22Q23074130030.707 ppm
2023-06-01Q23205310010.125 ppm
2023-08-22Q23354300040.0785 ppm
2023-08-22Q23354300110.0671 ppm
2023-11-08Q23480600010.575 ppm