The village of Downers Grove purchases Lake Michigan water that is supplied by the city of Chicago via the DuPage Water Commission.
Recently, some questions have been raised regarding the quality of Chicago water. Specifically,
testing of Chicago tap water by an independent agency indicated the presence of chromium 6, a carcinogenic heavy metal.
The United States Environmental Protection Agency is evaluating new health effects data of chromium 6 in drinking water. It is expected that this evaluation will be completed in late 2011.