# Illinois HB4124: UNCAP AFFORDABLE POWER ACT

Illinois HB4124, UNCAP AFFORDABLE POWER ACT, is a 104th General Assembly (2025–2026) House bill sponsored by Brad Halbrook (Republican); status in committee, last action 2025-10-15 (Referred to Rules Committee) (as of 2026-11-01).

- Canonical: https://policyrisk.com/state-bill/IL-HB4124-2025-2026
- As of: 2026-11-01
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Bill: Illinois HB4124
- State: Illinois
- Session: 104th General Assembly (2025–2026)
- Title: UNCAP AFFORDABLE POWER ACT
- Status: in committee
- Chamber: House
- Introduced: 2025-09-16
- Last action: 2025-10-15, Referred to Rules Committee
- Sponsor: Brad Halbrook (Republican)
- Cosponsors: 5
- Touches household money: no
- Economic provisions PRIA read: 0

## Summary

Specifies that the amendatory Act may be referred to as the Uncap Affordable Power Act. Amends the Illinois Power Agency Act, the Public Utilities Act, and the Environmental Protection Act. Provides, in each of those Acts, that it is the policy of the State not to regulate carbon dioxide emissions that arise from the combustion of fossil fuels for the purpose of generating electrical power. Provides that, beginning on the effective date of the amendatory Act, the Illinois Power Agency, the Illinois Commerce Commission, and the Illinois Environmental Protection Agency shall not regulate carbon dioxide emissions that arise from the combustion of fossil fuels for the purpose of generating electrical power. Removes carbon dioxide from the list of regulated greenhouse gases in the Environmental Protection Act. Repeals from the Environmental Protection Act a provision that provides for the regulation of greenhouse gas emissions from electric generating units and large greenhouse gas-emitting units. Makes other conforming changes. Effective immediately.

## Bill overview

No economic impacts identified for this bill.

## Sponsors and cosponsors

- Sponsor: Brad Halbrook (Republican), House
- Cosponsor: Adam M. Niemerg (Republican), House
- Cosponsor: David Friess (Republican), House
- Cosponsor: Jason R. Bunting (Republican), House
- Cosponsor: Jed Davis (Republican), House
- Cosponsor: Travis Weaver (Republican), House

## Actions (8)

- 2025-10-15: Referred to Rules Committee (House)
- 2025-10-15: First Reading (House)
- 2025-09-29: Added Co-Sponsor Rep. David Friess (House)
- 2025-09-29: Added Co-Sponsor Rep. Jed Davis (House)
- 2025-09-29: Added Co-Sponsor Rep. Jason R. Bunting (House)
- 2025-09-29: Added Co-Sponsor Rep. Adam M. Niemerg (House)
- 2025-09-29: Added Co-Sponsor Rep. Travis Weaver (House)
- 2025-09-16: Filed with the Clerk by Rep. Brad Halbrook (House)

## Bill text

- Introduced: [PDF](https://www.ilga.gov/documents/legislation/104/HB/PDF/10400HB4124.pdf)

## Related bills

- HB5198: AFFORDABLE HOUSING-CILAS (passed house)
- SB1937: PENSION CODE-VARIOUS (passed senate)
- HB2563: CONDO-RESERVE STUDY (in committee)
- HB4701: LIMITATIONS FACILITY FEES ACT (in committee)
- SB3008: DHS-ABLE PROGRAM INFO MATERIAL (passed senate)
- SB3484: VEH CD-PLATES-REGISTRATION (signed)

## Sources
- [Introduced (PDF)](https://www.ilga.gov/documents/legislation/104/HB/PDF/10400HB4124.pdf)

## Related
- [HB5198: AFFORDABLE HOUSING-CILAS](https://policyrisk.com/state-bill/IL-HB5198-2025-2026)
- [SB1937: PENSION CODE-VARIOUS](https://policyrisk.com/state-bill/IL-SB1937-2025-2026)
- [HB2563: CONDO-RESERVE STUDY](https://policyrisk.com/state-bill/IL-HB2563-2025-2026)
- [HB4701: LIMITATIONS FACILITY FEES ACT](https://policyrisk.com/state-bill/IL-HB4701-2025-2026)
- [SB3008: DHS-ABLE PROGRAM INFO MATERIAL](https://policyrisk.com/state-bill/IL-SB3008-2025-2026)
- [SB3484: VEH CD-PLATES-REGISTRATION](https://policyrisk.com/state-bill/IL-SB3484-2025-2026)
- [Illinois bills](https://policyrisk.com/states/illinois/bills)
- [Illinois state hub](https://policyrisk.com/states/illinois)
- [All state legislation](https://policyrisk.com/state-bills)

Source: PRIA, https://policyrisk.com/state-bill/IL-HB4124-2025-2026 (as of 2026-11-01).