Chicago voted and the city negotiated for lower electric rates from ComEd beginning in 2013, but residents still have a chance to opt out of the program.
Mayor Rahm Emanuel's office is sending letters to Chicagoans in case they don't want to be part of the municipal aggregation energy program. Chicago leaders believe the average home will save $135 to $165 over the first 16 months of the new contract.
Those who want to participate don't have to do anything, and their bills will reflect the expected savings.
"Municipal aggregation can potentially bring real savings to Chicago residents and small businesses through lower monthly electric bills, and can help the city increase its investment in renewable, clean energy sources,” Emanuel said when the program was announced.
The mayor said it's the first step of "an open and competitive process designed to deliver savings for Chicago ratepayers while ensuring a seamless transition and top quality customer service."