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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Cedar Rapids Water Department

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.

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
20131.53 ppb1816ND - 2.10 ppb
20140.920 ppb53ND - 1.60 ppb
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
2012-05-091902640ND
2012-05-091902641ND
2012-10-311943782ND
2012-10-311943784ND
2013-02-133B14016-01AM1.90 ppb
2013-02-133B14016-04AM2.10 ppb
2013-02-133B14016-02AM1.80 ppb
2013-02-133B14016-03AM2.00 ppb
2013-05-223E23046-04A1.50 ppb
2013-05-223E23046-03A1.50 ppb
2013-05-223E23046-01A1.50 ppb
2013-05-223E23046-02A1.70 ppb
2013-08-213H22042-01A1.60 ppb
2013-08-213H22042-07A1.80 ppb
2013-08-213H22042-05A1.80 ppb
2013-08-213H22042-03A1.70 ppb
2013-09-102005703ND
2013-09-102005705ND
2013-11-203K21099-01A1.70 ppb
2013-11-203K21099-03A1.70 ppb
2013-11-203K21099-07A1.60 ppb
2013-11-203K21099-05A1.70 ppb
2014-02-274B28122-05A1.50 ppb
2014-02-274B28122-01A1.50 ppb
2014-02-274B28122-03A1.60 ppb
2014-10-082085409ND
2014-10-082085412ND
2015-10-06OE302401ND
2015-10-06OE302405ND
2016-10-17OE441633ND
2016-10-17OE441634ND
2017-11-20OE592396ND
2017-11-20OE592397ND