Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Chromium (total)

Cary

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.

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
2013ND180ND
2014N/A00N/A
2015ND80ND
2016N/A00N/A
2017N/A00N/A

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
2012-10-162102832-02ND
2012-10-162102832-03ND
2012-10-162102832-04ND
2012-10-162102832-06ND
2012-10-162102832-07ND
2012-10-162102832-08ND
2012-10-162102832-01ND
2012-11-122112230-01ND
2013-05-14719803-8989ND
2013-05-14719801-8989ND
2013-05-14719799-8989ND
2013-05-20720656-9000ND
2013-05-20720658-9000ND
2013-05-20720660-9000ND
2013-05-21721080-9080ND
2013-05-21721078-9080ND
2013-05-21721076-9080ND
2013-11-18759579-10381ND
2013-11-18759466-10377ND
2013-11-18759462-10377ND
2013-11-18759464-10377ND
2013-11-18759581-10381ND
2013-11-18759583-10381ND
2013-11-22760428-10414ND
2013-11-22760426-10414ND
2013-11-22760430-10414ND
2015-11-195113102-02ND
2015-11-195113102-01ND
2015-11-195113111-02ND
2015-11-195113111-01ND
2015-11-195113106-02ND
2015-11-195113106-01ND
2015-11-235113717-02ND
2015-11-235113717-01ND