The U.S. Environmental Protection Agency is developing a new regulation to require public notices of combined sewer overflow discharges into the Great Lakes.

Michigan Congresswoman Candice Miller is in favor of such a regulation, but she says it won’t be enough.

Combined sewer overflows happen when heavy rains overwhelm a city’s combined sanitary and stormwater system, sending untreated or partially treated sewage into rivers and lakes.

“The public can’t have too much information about it,” says Miller. “I’m suggesting that you have dates and times of discharge, and where the discharge is happening, and how much volume of discharge. You have all kinds of health implications, you’ve got beach closures, and impact on our water supply.”