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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of Cayce

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND40ND
20140.0920 ppb52ND - 0.240 ppb
2015ND10ND
2016ND10ND
2017ND10ND

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
2012-03-05AD03818ND
2013-03-13AD21164ND
2013-07-30201308010387AMND
2013-07-30201308010349AMND
2013-10-29201310310111AMND
2014-01-23AD34871ND
2014-01-27201401310076AMND
2014-01-27201401310093AMND
2014-04-28201405010412AM0.220 ppb
2014-04-28201405010393AM0.240 ppb
2015-01-21AD50492ND
2016-02-03AD70090ND
2017-01-17AD88352ND