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A set of electric meters in Chicago. Residential Commonwealth Edison customers will see an average $10.60 increase in monthly bills this summer. Ameren customers can expect an even larger increase. (Capitol News Illinois photo by Andrew Adams)

ICC Approves Ameren Illinois Natural Gas Rate Increase

By Greg Halbleib Nov 20, 2025 | 5:26 AM

The Illinois Commerce Commission on Wednesday approved a rate increase for natural gas customers of Ameren Illinois, although the commission reduced the requested hike by 43 percent.

The ICC said it lowered the request by 55.8 million dollars, resulting in a return on equity of 9.6 percent.

The company had requested a 128.8 million dollar increase with a return on equity of 10.7 percent.

Ameren serves about 800 thousand natural gas customers in central and southern Illinois.