EWG's Tap Water Database — 2021 UPDATE



US Army South Fort Hood

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
20140.330 ppm110.330 ppm
20150.170 ppm110.170 ppm
20160.400 ppm220.150 ppm - 0.650 ppm
20170.385 ppm220.380 ppm - 0.390 ppm
20180.200 ppm220.200 ppm
20190.570 ppm220.570 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
2014-03-17AC470270.330 ppm
2015-02-12AC803290.170 ppm
2016-01-26AD199360.650 ppm
2016-07-19AD446480.150 ppm
2017-02-16AD709750.380 ppm
2017-02-16AD709730.390 ppm
2018-04-04AE211170.200 ppm
2018-04-04AE211270.200 ppm
2019-05-08AE652890.570 ppm
2019-05-08AE652910.570 ppm