IL HB5801

Accelerates reporting requirements for greenhouse gas emissions from June 30 of 2025 to June 30 of 2023, with the Environmental Protection Agency publishing annual reports on emissions from individual units and statewide aggregates.

Changes the joint reporting interval from every 5 years beginning in 2025 to every 2 years beginning in 2023, requiring the EPA, Illinois Power Agency, and Illinois Commerce Commission to assess renewable energy progress, emissions reductions, electric resource adequacy, and reliability for the following 2-year period (rather than 5-year period).

Mandates emissions reduction deadlines for coal-fired and oil-fired electric generating units and large greenhouse gas-emitting units, with non-public units reaching zero emissions by January 1, 2030, and public units by December 31, 2045.

Establishes phased emissions reduction requirements for gas-fueled units based on pollution rates and location proximity to environmental justice communities, with deadlines ranging from January 1, 2030, to January 1, 2045.

Allows temporary extensions beyond reduction deadlines if regional transmission organizations determine continued operation is necessary for grid reliability, subject to cooperation requirements and approval processes through the Illinois Commerce Commission.