A new report says the groundwater at some of Michigan's coal ash storage sites is contaminated with toxic chemicals, especially arsenic.
The report compiled data that's required by a new federal rule, which mandates testing, disclosure, and cleanups if necessary.
The report notes Consumers Energy disclosed arsenic levels 48 times the federal safety standard at the D.E. Karn Power Plant, and DTE Energy disclosed arsenic levels 38 times the federal safety standard at its Trenton Power Plant.
Charlotte Jameson of the Michigan Environmental Council calls those levels "alarming.