EWG's Tap Water Database — 2019 UPDATE


Chromium (total)

City of Wichita Falls

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20130.811 ppb220.708 ppb - 0.913 ppb
20140.933 ppb1210ND - 2.70 ppb
20150.977 ppb770.400 ppb - 1.40 ppb
20160.515 ppb220.400 ppb - 0.630 ppb
20171.05 ppb221.000 ppb - 1.10 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date Lab ID Result
2013-09-25Q13081440220.913 ppb
2013-09-25Q13081440240.708 ppb
2014-03-3130002661.20 ppb
2014-05-13Q14158160022.70 ppb
2014-08-14Q14367960210.790 ppb
2014-08-2130891000.700 ppb
2014-09-0830994580.900 ppb
2014-09-0830994741.50 ppb
2014-11-1731406210.600 ppb
2014-11-1731406250.700 ppb
2014-12-1531558451.000 ppb
2014-12-1531558421.10 ppb
2015-02-09Q15050190071.40 ppb
2015-02-09Q15050190061.10 ppb
2015-02-1731896470.400 ppb
2015-03-2432134421.000 ppb
2015-03-2432132471.10 ppb
2015-05-11Q15171930020.930 ppb
2015-09-22Q15370190020.910 ppb
2016-02-01Q16041900030.630 ppb
2016-02-01Q16041900020.400 ppb
2017-03-06Q17092270031.000 ppb
2017-08-07Q17330930071.10 ppb