Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Chromium (total)

Columbus

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND10ND
20140.0556 ppb92ND - 0.260 ppb
2015ND20ND
2016ND10ND
2017ND10ND

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
2012-05-07AH58334ND
2012-10-22AH82402ND
2012-12-03AH85003ND
2013-07-08AI05834ND
2014-02-04201402050222AMND
2014-02-04201402050226AMND
2014-02-26AI28736ND
2014-05-06201405080358AMND
2014-05-06201405080339AMND
2014-08-18201408190129AMND
2014-08-18201408190494AMND
2014-11-11201411120138AM0.260 ppb
2014-11-11201411120140AM0.240 ppb
2015-01-27AI63479ND
2015-11-10AJ00827ND
2016-02-08AJ06118ND
2017-02-07AJ46135ND