Nitrate

Town of Flower Mound

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
2013	N/A	0	0	N/A
2014	0.775 ppm	2	2	0.349 ppm - 1.20 ppm
2015	0.695 ppm	2	2	0.370 ppm - 1.02 ppm
2016	0.631 ppm	3	3	0.354 ppm - 1.17 ppm
2017	0.531 ppm	3	3	0.429 ppm - 0.731 ppm
2018	0.292 ppm	3	3	0.185 ppm - 0.478 ppm
2019	0.556 ppm	3	3	0.286 ppm - 1.08 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
2014-11-11	Q1455683001	1.20 ppm
2014-11-11	Q1455683008	0.349 ppm
2015-11-04	Q1543752001	1.02 ppm
2015-11-04	Q1543752002	0.370 ppm
2016-10-11	Q1643185001	1.17 ppm
2016-10-11	Q1643185002	0.354 ppm
2016-10-11	Q1643185011	0.370 ppm
2017-10-24	Q1754450001	0.731 ppm
2017-10-24	Q1754450011	0.429 ppm
2017-10-24	Q1754450006	0.432 ppm
2018-07-24	Q1829579007	0.478 ppm
2018-07-24	Q1829579001	0.213 ppm
2018-07-24	Q1829579008	0.185 ppm
2019-08-06	Q1952128001	1.08 ppm
2019-08-06	Q1952128002	0.303 ppm
2019-08-06	Q1952128003	0.286 ppm