EWG's Tap Water Database — 2021 UPDATE



City of Killeen

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
20140.325 ppm440.320 ppm - 0.330 ppm
20150.150 ppm440.140 ppm - 0.160 ppm
20160.695 ppm440.660 ppm - 0.770 ppm
20170.393 ppm440.380 ppm - 0.410 ppm
20180.190 ppm440.180 ppm - 0.200 ppm
20190.640 ppm440.620 ppm - 0.660 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
2014-04-03AC491470.320 ppm
2014-04-03AC491460.320 ppm
2014-04-03AC491450.330 ppm
2014-04-03AC491480.330 ppm
2015-05-13AC917320.140 ppm
2015-05-13AC917340.140 ppm
2015-05-13AC917360.160 ppm
2015-05-13AC917350.160 ppm
2016-02-03AD216730.680 ppm
2016-02-03AD216710.660 ppm
2016-02-03AD216660.670 ppm
2016-02-03AD216700.770 ppm
2017-02-21AD711460.380 ppm
2017-02-21AD711440.410 ppm
2017-05-08AD828950.380 ppm
2017-05-08AD828960.400 ppm
2018-04-17AE226620.190 ppm
2018-04-17AE226630.190 ppm
2018-04-17AE226600.180 ppm
2018-04-17AE226610.200 ppm
2019-03-04AE567730.660 ppm
2019-03-04AE567700.620 ppm
2019-03-04AE567720.640 ppm
2019-03-04AE567710.640 ppm