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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

City of American Canyon

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.

MORE ABOUT THIS CONTAMINANT

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0260 ppb101ND - 0.260 ppb
2015ND60ND
2016ND40ND
2017ND30ND
2018ND40ND
20190.263 ppb31ND - 0.790 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
2014-01-149541-004-0820ND
2014-04-089541-004-0830ND
2014-05-21201405220338AMND
2014-05-21201405220491AMND
2014-07-089541-004-0825ND
2014-08-12201408130298AMND
2014-08-12201408130818AMND
2014-10-149541-004-0815ND
2014-11-05201411060369AMND
2014-11-05201411060371AM0.260 ppb
2015-01-139541-004-1020ND
2015-02-04201502050647AMND
2015-02-04201502050802AMND
2015-04-149541-004-1045ND
2015-07-149541-004-0815ND
2015-10-159541-004-1010ND
2016-01-129541-004-0730ND
2016-04-129541-004-1230ND
2016-07-139541-004-0950ND
2016-10-119541-004-1040ND
2017-01-109541-004-1105ND
2017-04-119541-004-1030ND
2017-07-119541-004-0820ND
2018-01-099541-004-1500ND
2018-04-109541-004-1045ND
2018-07-109541-004-1310ND
2018-10-099541-004-0850ND
2019-01-089541-004-0840ND
2019-04-099541-004-0750ND
2019-07-099541-004-08450.790 ppb