Nitrate

West Brazos 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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.0650 ppm	2	2	0.0500 ppm - 0.0800 ppm
2015	0.0850 ppm	2	2	0.0700 ppm - 0.1000 ppm
2016	0.0600 ppm	2	2	0.0500 ppm - 0.0700 ppm
2017	0.0620 ppm	3	3	0.0585 ppm - 0.0670 ppm
2018	0.0507 ppm	3	3	0.0141 ppm - 0.0781 ppm
2019	0.0892 ppm	3	2	ND - 0.182 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

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
2014-03-19	AC47511	0.0500 ppm
2014-06-10	AC56332	0.0800 ppm
2015-03-18	AC84869	0.1000 ppm
2015-12-08	AD15883	0.0700 ppm
2016-03-03	AD26774	0.0700 ppm
2016-03-03	AD26775	0.0500 ppm
2017-02-15	Q1706555010	0.0605 ppm
2017-06-22	Q1726207009	0.0670 ppm
2017-11-28	Q1760204003	0.0585 ppm
2018-09-19	Q1837446008	0.0600 ppm
2018-09-19	Q1837446009	0.0141 ppm
2018-09-19	Q1837446010	0.0781 ppm
2019-10-23	Q1973493003	0.182 ppm
2019-10-23	Q1973490007	0.0857 ppm
2019-10-23	Q1973490008	ND