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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Olivenhain Municipal Water District

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND90ND
2014ND90ND
2015ND10ND
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
2012-08-219590-003-0850ND
2013-08-209590-003-1200ND
2013-08-21201308220237AMND
2013-08-21201308220206AMND
2013-08-21201308220217AMND
2013-08-27201308280258AMND
2013-11-21201311220614AMND
2013-11-21201311220598AMND
2013-11-21201311220602AMND
2013-11-21201311220604AMND
2014-02-12201402130504AMND
2014-02-12201402130485AMND
2014-02-12201402130491AMND
2014-02-12201402130487AMND
2014-05-28201405290358AMND
2014-05-28201405290364AMND
2014-05-28201405290356AMND
2014-05-28201405290360AMND
2014-08-209590-003-1330ND
2015-08-199590-003-1221ND
2016-08-179590-003-1100ND
2017-08-249590-003-0900ND