Know Your Environment. Protect Your Health.

Nitrate

Cross Timbers Water Supply Corporation

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)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.157 ppm54ND - 0.666 ppm
20190.167 ppm53ND - 0.745 ppm
20200.104 ppm53ND - 0.414 ppm
20210.0676 ppm54ND - 0.182 ppm
20220.235 ppm76ND - 0.550 ppm
20230.343 ppm770.0399 ppm - 0.705 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
2018-01-11Q18016160080.0790 ppm
2018-01-11Q18016160070.0102 ppm
2018-04-11Q18151880070.0275 ppm
2018-04-11Q1815188008ND
2018-12-05Q18496360010.666 ppm
2019-03-07Q19099090050.745 ppm
2019-03-07Q19099090100.0253 ppm
2019-06-05Q1932306010ND
2019-06-05Q1932306012ND
2019-06-05Q19323060130.0656 ppm
2020-05-18Q2019652008ND
2020-10-12Q2039719016ND
2020-10-12Q20397190170.0719 ppm
2020-10-12Q20397190180.414 ppm
2020-12-01Q20481730070.0322 ppm
2021-08-30Q21235130180.182 ppm
2021-08-30Q21235130170.0487 ppm
2021-08-30Q21235130050.0754 ppm
2021-08-30Q2123513006ND
2021-11-08Q21313710040.0320 ppm
2022-02-17Q22059650080.0701 ppm
2022-02-17Q22059650090.378 ppm
2022-09-22Q22285420010.550 ppm
2022-11-29Q22353120130.0694 ppm
2022-11-29Q22353120160.514 ppm
2022-11-29Q2235312012ND
2022-11-29Q22353120010.0645 ppm
2023-03-02Q23084880010.683 ppm
2023-03-02Q23084880180.121 ppm
2023-06-19Q23230820010.411 ppm
2023-09-20Q23408620010.394 ppm
2023-11-27Q23504110090.0399 ppm
2023-11-27Q23504110100.0444 ppm
2023-11-27Q23504110170.705 ppm