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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Rockford

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.

 

109

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND30ND
20140.0513 ppb434ND - 1.27 ppb
20150.0438 ppb365ND - 0.417 ppb
2016ND20ND
20170.257 ppb231ND - 5.90 ppb

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
2012-01-242012864-04ND
2012-04-252043207-04ND
2013-06-253063688-01ND
2013-11-133111834-01ND
2013-12-034013379-01ND
2014-01-214012700-03ND
2014-01-214012700-04ND
2014-01-214012700-05ND
2014-01-214012700-06ND
2014-01-224012700-01ND
2014-01-224012700-02ND
2014-01-274013503-02ND
2014-01-284013503-01ND
2014-01-314020631-01ND
2014-01-314020631-02ND
2014-01-314020631-03ND
2014-01-314020631-04ND
2014-01-314020631-05ND
2014-02-184022291-01ND
2014-02-184022289-01ND
2014-02-254023202-01ND
2014-07-08801404-11773ND
2014-07-08801677-117731.27 ppb
2014-07-08801398-11773ND
2014-07-08801414-11773ND
2014-07-08801390-11773ND
2014-07-08801683-11773ND
2014-07-08801394-11773ND
2014-07-08801396-117730.439 ppb
2014-07-08801412-11773ND
2014-07-08801665-117730.279 ppb
2014-07-08801679-11773ND
2014-07-08801400-11773ND
2014-07-08801669-11773ND
2014-07-08801667-11773ND
2014-07-08801685-11773ND
2014-07-08801410-117730.220 ppb
2014-07-08801392-11773ND
2014-07-08801406-11773ND
2014-07-08801673-11773ND
2014-07-08801681-11773ND
2014-07-08801675-11773ND
2014-07-234073622-05ND
2014-07-234073622-01ND
2014-07-234073622-04ND
2014-10-284104357-01ND
2014-12-054121752-01ND
2014-12-124122805-01ND
2015-01-08838246-13206ND
2015-01-08838250-13206ND
2015-01-08838244-13206ND
2015-01-08838225-132060.417 ppb
2015-01-08838227-13206ND
2015-01-08838235-13206ND
2015-01-08838233-13206ND
2015-01-08838264-13206ND
2015-01-08838218-13206ND
2015-01-08838258-132060.340 ppb
2015-01-08838212-13206ND
2015-01-08838210-13206ND
2015-01-08838216-13206ND
2015-01-08838256-13206ND
2015-01-08838252-13206ND
2015-01-08838248-132060.404 ppb
2015-01-08838242-13206ND
2015-01-08838237-13206ND
2015-01-08838214-13206ND
2015-01-08838254-13206ND
2015-01-08838220-13206ND
2015-01-08838208-13206ND
2015-01-285013651-04ND
2015-04-155042507-02ND
2015-06-175062896-01ND
2015-07-09870165-145390.201 ppb
2015-07-13870168-14539ND
2015-07-13870172-14539ND
2015-07-13870174-14539ND
2015-07-13870176-14539ND
2015-07-13870170-14539ND
2015-07-13870178-14539ND
2015-07-13870180-145390.216 ppb
2015-09-14882884-14953ND
2015-12-09897657-15547ND
2015-12-09897655-15547ND
2016-10-126102040-01ND
2016-12-146122205-01ND
2017-01-067011622-01ND
2017-01-067011622-02ND
2017-01-137012600-01ND
2017-01-137012600-02ND
2017-01-137012600-04ND
2017-01-137012603-015.90 ppb
2017-01-137012603-02ND
2017-01-137012603-03ND
2017-01-207013468-04ND
2017-01-207013468-01ND
2017-01-207013468-02ND
2017-02-037021369-02ND
2017-02-037021369-01ND
2017-02-107022427-01ND
2017-03-087031384-01ND
2017-05-267055219-01ND
2017-07-247075084-07ND
2017-07-247075084-06ND
2017-07-247075084-05ND
2017-07-247075084-02ND
2017-07-247075084-03ND
2017-10-137103385-03ND
2017-12-067121184-03ND