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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Tennessee American Water

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND40ND
20140.120 ppb52ND - 0.300 ppb
20150.1000 ppb83ND - 0.300 ppb
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 Result
2012-03-13ND
2012-06-18ND
2013-01-29ND
2013-06-05ND
2013-09-25ND
2013-12-04ND
2014-01-20ND
2014-07-23ND
2014-10-21ND
2014-12-020.300 ppb
2014-12-020.300 ppb
2015-01-12ND
2015-03-030.200 ppb
2015-03-03ND
2015-06-02ND
2015-06-02ND
2015-07-21ND
2015-09-140.300 ppb
2015-09-140.300 ppb
2016-01-19ND
2016-07-13ND
2017-01-10ND
2017-07-11ND