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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Dalton Utilities

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.

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND20ND
20150.0927 ppb266ND - 0.520 ppb
2016ND30ND
2017ND30ND

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
2012-05-07AH58326ND
2012-05-07AH58327ND
2013-03-26AH92679ND
2013-03-26AH92678ND
2014-02-24AI28474ND
2014-02-24AI28475ND
2015-01-27AI63480ND
2015-01-27AI63481ND
2015-03-0435178480001AMND
2015-03-0435178480003AMND
2015-03-09AI68508ND
2015-03-3135181774001AM0.490 ppb
2015-03-3135181774003AM0.390 ppb
2015-05-0435186669001AM0.520 ppb
2015-06-0935192388009AMND
2015-06-0935192388005AMND
2015-06-0935192388001AMND
2015-06-0935192388003AMND
2015-06-0935192388007AMND
2015-06-0935192388011AMND
2015-09-0935206664001AMND
2015-09-0935206664003AM0.300 ppb
2015-09-0935206663003AM0.480 ppb
2015-09-0935206663001AMND
2015-09-0935206665003AMND
2015-09-0935206665001AMND
2015-12-0835220221003AMND
2015-12-0835220221001AMND
2015-12-0835220221006AM0.230 ppb
2015-12-0835220221008AMND
2015-12-0835220221010AMND
2015-12-0835220221012AMND
2016-02-08AJ06018ND
2016-02-08AJ06019ND
2016-03-28AJ08758ND
2017-02-14AJ46459ND
2017-02-14AJ46458ND
2017-02-14AJ46457ND