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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Wellborn SUD

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
20131.77 ppb330.405 ppb - 2.82 ppb
2014ND20ND
20157.25 ppb21ND - 14.5 ppb
2016ND30ND
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
2012-02-01AB79927ND
2012-06-18AB93061ND
2012-09-12AC00734ND
2013-02-0613022280040.405 ppb
2013-12-12Q13176240202.82 ppb
2013-12-12Q13176240142.07 ppb
2014-02-13AC42866ND
2014-02-13AC42867ND
2015-03-24AC85810ND
2015-03-24AC8581414.5 ppb
2016-03-09AD27813ND
2016-03-09AD27814ND
2016-03-09AD27811ND
2017-03-07AD73643ND
2017-03-07AD73639ND