IL HB5898

Extends deadline for coal and oil-fired electric generating units and large greenhouse gas-emitting units (non-public) to reduce CO2e and copollutant emissions to zero from January 1, 2030 to January 1, 2040.

Extends deadline for coal-fired public greenhouse gas-emitting units to achieve zero CO2e emissions from December 31, 2035 to December 31, 2045, and shifts 45% reduction requirement from January 1, 2035 to January 1, 2045.

Extends various deadlines by 10 years for natural gas-fired units, including requiring certain high-emission units to meet zero emissions by January 1, 2050 instead of 2040, and others by January 1, 2055 instead of 2045.

Allows units to continue operating past applicable deadlines if necessary for power grid supply, reliability, or emergency backup purposes, subject to regional transmission organization determinations and Illinois Commerce Commission approval.

Requires Environmental Protection Agency, Illinois Power Agency, and Illinois Commerce Commission to jointly report every 5 years beginning in 2025 on progress toward emissions reduction goals and renewable energy development, with authority to develop reliability mitigation plans if resource adequacy shortfalls are identified.