EWG's Tap Water Database — 2021 UPDATE



Hixson Utility District

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
20140.665 ppm220.550 ppm - 0.780 ppm
20150.645 ppm220.590 ppm - 0.700 ppm
20160.690 ppm220.671 ppm - 0.708 ppm
20170.681 ppm220.599 ppm - 0.763 ppm
20180.401 ppm21ND - 0.801 ppm
20190.791 ppm220.782 ppm - 0.799 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 Result
2014-01-290.550 ppm
2014-01-290.780 ppm
2015-01-210.590 ppm
2015-01-210.700 ppm
2016-02-290.671 ppm
2016-02-290.708 ppm
2017-01-180.599 ppm
2017-01-180.763 ppm
2018-01-300.801 ppm
2019-01-290.799 ppm
2019-01-290.782 ppm