EWG's Tap Water Database — 2021 UPDATE


Chromium (hexavalent)

City of Detroit

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20140.0959 ppb880.0590 ppb - 0.170 ppb
20150.122 ppb24240.0600 ppb - 0.240 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-10-2035160217005AM0.0940 ppb
2014-10-2035160217007AM0.0890 ppb
2014-10-2035160217003AM0.0860 ppb
2014-10-2035160217001AM0.0950 ppb
2014-10-2035160217015AM0.0790 ppb
2014-10-2035160217011AM0.0950 ppb
2014-10-2035160217009AM0.170 ppb
2014-10-2035160217013AM0.0590 ppb
2015-01-1435171455001AM0.0840 ppb
2015-01-1435171455005AM0.0960 ppb
2015-01-1435171455007AM0.0960 ppb
2015-01-1435171455011AM0.0800 ppb
2015-01-1435171455013AM0.0600 ppb
2015-01-1435171455015AM0.0840 ppb
2015-01-1435171455003AM0.0820 ppb
2015-01-1435171455009AM0.150 ppb
2015-04-1335183948015AM0.0970 ppb
2015-04-1335183948009AM0.0630 ppb
2015-04-1335183948013AM0.1000 ppb
2015-04-1335183948011AM0.1000 ppb
2015-04-1335183948001AM0.0950 ppb
2015-04-1335183948003AM0.0960 ppb
2015-04-1335183948005AM0.110 ppb
2015-04-1335183948007AM0.1000 ppb
2015-07-1435197937005AM0.180 ppb
2015-07-1435197937001AM0.190 ppb
2015-07-1435197937007AM0.240 ppb
2015-07-1435197937003AM0.210 ppb
2015-07-1435197937013AM0.180 ppb
2015-07-1435197937009AM0.150 ppb
2015-07-1435197937011AM0.110 ppb
2015-07-1435197937015AM0.180 ppb