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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of Corpus Christi

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND10ND
2014ND90ND
2015ND10ND
2016ND10ND
2017ND20ND

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
2013-06-24AC22885ND
2014-01-162959149ND
2014-01-162959155ND
2014-03-24AC48110ND
2014-04-153008552ND
2014-04-153008558ND
2014-08-203088243ND
2014-08-203088249ND
2014-10-153123907ND
2014-10-153123892ND
2015-02-17AC80731ND
2016-02-10AD22954ND
2017-01-18AD65305ND
2017-03-21AD75980ND