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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Iowa-American Water Company - Davenport

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.0333 ppb61ND - 0.200 ppb
20150.350 ppb220.300 ppb - 0.400 ppb
2016ND10ND
2017N/A00N/A

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
2014-04-1425232701ND
2014-04-1425234001ND
2014-07-0126150201ND
2014-07-01261485010.200 ppb
2014-10-0827253401ND
2014-10-0827252401ND
2015-01-07280105010.300 ppb
2015-01-07280115010.400 ppb
2016-11-1033690801ND