Study Maps Five Paths for Illinois Gas Decarbonization
A consultant modeled five pathways to cut natural gas use in Illinois homes and buildings as the state works toward its 2050 clean energy target.
Updated on Nov. 9, 2026 in Utilities
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A Gas Decarbonization Pathways Study authorized by the Illinois Commerce Commission through its Future of Gas process modeled five pathways to reduce gas use in the state. The study examined costs, emissions, utility-system impacts and effects on environmental justice communities.
Why it matters
Burning gas to heat buildings accounts for 17% of Illinois emissions, and the state has set a goal of 100 percent clean energy by 2050. The commission found the gas distribution system as currently operated will need to change for those decarbonization goals to be met.
Heat pumps serve 3% of Illinois homes, while the study projects they will be needed in 52%-97% of homes by 2050. Gas use is projected to decline approximately 50%-85% across the modeled scenarios, and gas rates could rise fourfold to 25-fold by 2050.
The players
Illinois Commerce Commission
The state regulator that authorized the Gas Decarbonization Pathways Study through its Future of Gas process and oversees utility operations in Illinois.
The details
The study modeled five pathways examining costs, emissions, utility-system impacts and effects on environmental justice communities for Illinois. The commission's Future of Gas process framed the analysis around the state's Climate and Equitable Jobs Act decarbonization requirements.
Timeline
2023: The Illinois Commerce Commission identified the challenge facing the gas distribution system.
2050: Illinois' target year for entirely clean energy under the Climate and Equitable Jobs Act.
Market Landscape
The study's modeled pathways arrive as Illinois works to meet the Climate and Equitable Jobs Act's requirement for entirely clean energy by 2050. The findings show how the state's gas utilities would have to change to align with that mandate.
Illinois homeowners using gas heat could see their utility rates shift as the state moves toward decarbonization, with projected gas rates rising fourfold to 25-fold by 2050. Homes may need heat pumps, as the study projects they will be needed in 52%-97% of homes by 2050.
The takeaway
Gas use reduction in Illinois is being framed around concrete tradeoffs in cost, emissions and infrastructure rather than a single fixed path. Residents tracking their utility bills should watch how the commission chooses among these pathways.
Further reading
Explore more on utilities as Illinois weighs how to reduce natural gas use in homes and buildings.
Source note: This article includes information reported by The Cool Down.
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