If you would like to Join our municipal aggregation please call 833-358-0518
(This is only for Residential Customers - commercial customer please call 800-828-6719)
Central Illinois Municipal Aggregation
Central Illinois Municipal Aggregation (CIMA) was formed in 2017 by The Stone River Group, LLC. CIMA is a group of municipalities that have joined together for one common goal, provide the best possible electric supply cost for all their residents. Municipal aggregation in Illinois is a program designed to allow municipalities to negotiate a fixed price of all the residents.
The Stone River Group has been working with municipalities since 2009 to provide the best possible supply options. Since that time The Stone River Group has been able to provide great rates to all our community members. Currently we serve over 50,000 residential and small commercial customers in our aggregation program. Take a look at our successes over the years.
2022 Update
CIMA Locked in a new rate for 2022. The contract price of $0.07859 was locked in for 3 years (June 2022 to June 2025).
The chart below compares the rate that was locked in on 03/24/2022 to rates on a daily basis after the rate was locked in.
Rates and Savings for CIMA Members
What is Municipal Aggregation?
Section 1-92 of the Illinois Power Agency Act allows for the aggregation of electric load by municipalities and counties (i.e., government aggregation). This means a municipality or county can negotiate for the purchase of the combined electric supply of its residents and eligible small businesses.
Is there more than one type of aggregation program?
Yes, there are two different types of aggregation programs: Opt-out and Opt-in.
Opt-out requires the voters of a municipality or county to pass a referendum that automatically combines the electric load for residential and eligible small businesses for purchasing purposes except for those customers who actively choose not to participate in the municipality's or county's purchase program.
Opt-in aggregation program means that after the authorities within a municipality or county adopt an ordinance to combine the electric load for residential and eligible small businesses for purchasing purposes, only those residents and eligible small businesses that actually take action to “opt-in” to participate in the aggregation program are able to have their electric load included in the aggregation program and take advantage of the price negotiated on their behalf.
How will the bill change?
In most cases, you will continue to receive one bill from the utility that will contain both the utility's delivery charges and the chosen supplier's electric supply charges billed at the negotiated rate. Please contact your municipality or county to find out the chosen billing method.