EWG's Tap Water Database — 2019 UPDATE



City of Mineral Wells

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
20120.0600 ppm110.0600 ppm
20130.0533 ppm220.0365 ppm - 0.0700 ppm
20140.0305 ppm110.0305 ppm
20150.0505 ppm110.0505 ppm
20160.0310 ppm110.0310 ppm
20170.0528 ppm110.0528 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
2012-12-1212127080010.0600 ppm
2013-02-2013026930010.0700 ppm
2013-08-07Q13051260120.0365 ppm
2014-05-21Q14171850080.0305 ppm
2015-03-12Q15093610030.0505 ppm
2016-06-08Q16229950030.0310 ppm
2017-02-23Q17079480030.0528 ppm