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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Griffin

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND180ND
2014ND20ND
2015ND20ND
2016ND20ND
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
2012-05-08AH61154ND
2012-05-15AH64675ND
2013-03-212798085ND
2013-03-212798089ND
2013-03-212798068ND
2013-03-212798094ND
2013-06-12AI03634ND
2013-06-272850012ND
2013-06-272850048ND
2013-06-272850021ND
2013-06-272850005ND
2013-07-10AI06099ND
2013-09-252903786ND
2013-09-252903566ND
2013-09-252903437ND
2013-09-252903373ND
2013-12-172947897ND
2013-12-172947888ND
2013-12-172947523ND
2013-12-172947540ND
2014-02-25AI28735ND
2014-02-25AI28627ND
2015-01-27AI63626ND
2015-02-10AI64715ND
2016-01-27AJ05145ND
2016-02-08AJ06091ND
2017-02-09AJ46223ND
2017-02-13AJ46346ND