The numbers for raw sewage dumping from Milwaukee and Chicago shine a light on the need for a dashboard of Great Lake metrics. Chicago dumps twice as much as Milwaukee.
The numbers surfaced in a legal settlement between the EPA and the Chicago reclamation district that calls for two massive reservoirs to be built over the next 17 years to catch to store the raw sewage for treatment.
In the years 2007 through 2010, Chicago bypassed an average of five billion gallons per year, while Milwaukee dumped an average of two billion gallons. Neither is acceptable; hence the EPA agreement that will require an additional $400 million on the two reservoirs.