EWG's Tap Water Database — 2019 UPDATE



Fort Bend County MUD 25

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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20120.0800 ppm440.01000 ppm - 0.150 ppm
20130.117 ppm660.01000 ppm - 0.160 ppm
20140.118 ppm550.01000 ppm - 0.170 ppm
20150.115 ppm440.01000 ppm - 0.170 ppm
20160.1000 ppm440.01000 ppm - 0.150 ppm
20170.108 ppm43ND - 0.160 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
2012-03-20AB844780.01000 ppm
2012-03-20AB844790.150 ppm
2012-03-20AB844810.150 ppm
2012-07-12AB951820.01000 ppm
2013-02-28AC118710.160 ppm
2013-02-28AC118770.140 ppm
2013-02-28AC118760.01000 ppm
2013-03-21AC142600.140 ppm
2013-05-09AC190140.110 ppm
2013-05-09AC190050.140 ppm
2014-01-16AC391920.140 ppm
2014-01-16AC392020.140 ppm
2014-01-16AC391970.170 ppm
2014-01-16AC391900.01000 ppm
2014-01-16AC391850.130 ppm
2015-02-04AC791560.150 ppm
2015-02-04AC791620.01000 ppm
2015-02-04AC791210.130 ppm
2015-02-04AC791200.170 ppm
2016-01-19AD184800.0900 ppm
2016-01-19AD184460.150 ppm
2016-01-19AD184490.150 ppm
2016-01-19AD184470.01000 ppm
2017-01-12AD645380.130 ppm
2017-01-12AD645780.140 ppm
2017-01-12AD645830.160 ppm