HB 1226 Colorado House · 2026 Regular Session

Manage Emissions from Electric Generating Units

Summary
The act requires the division of administration in the department of public health and environment (division), no later than July 2029, to propose a final rule (rule) establishing certain limits on the emission of nitrogen oxides and sulfur dioxide (emission limits) from an electric generating unit (unit) that is owned or operated by an electric utility; is located in the state; and emitted 200 tons or more of nitrogen oxides, or sulfur dioxide, or both in calendar year 2024 (covered unit). The rule must require compliance with the emission limits as soon as practicable after December 31, 2034, and must not cover units that, before December 31, 2029, have ceased operations; burn natural gas, fuel oil, or both only; or have certain systems installed. A unit that operates after December 31, 2034, must install certain pollution controls and comply with the emission limits on or before December 31, 2034.     An owner or operator of a unit is required to provide quarterly emission reports showing compliance with the rule to the division. On August 1, 2029, the air quality control commission in the department of public health and environment (AQCC) must submit to the general assembly a list of any units that are subject to a federal order. If there are any units subject to a federal order, the AQCC must also submit to the general assembly recommendations on whether to amend the requirements for units subject to federal order.     An investor-owned utility or wholesale electric cooperative that is the owner or operator of a unit is required, beginning 150 days after the issuance of a federal order requiring the unit to remain operating after the unit was scheduled to retire (order) and continuing every 90 days until the order is no longer in effect, to file a report with the public utilities commission (commission) that contains certain information about the costs to operate the unit and the amount of electricity generated by the unit. The commission must make these reports publicly available. An investor-owned utility is also permitted to submit an application for a financing order to recover the costs of complying with an order.     Any decision by the commission approving or modifying a portfolio in an electric resource plan of an investor-owned utility serving more than 500,000 customers must approve an amount of accredited capacity that allows the investor-owned utility to reliably achieve certain retirement and carbon dioxide emission reduction requirements. This requirement applies to an investor-owned utility serving more than 500,000 customers until the division determines that the investor-owned utility has achieved certain carbon dioxide emission reductions or until the investor-owned utility has retired all covered units, whichever is later.(Note: This summary applies to this bill as enacted.)
Bill status signed all 5 stages cleared
Introduction
Feb 2026
Committee Review
Apr 2026
House Passage
Jun 2026
Senate Passage
Jun 2026
Signed into Law
Jun 2026
Introduced Feb 18, 2026 Signed Jun 4, 2026
Maddy AI version diff · 6 comparisons

What changed between versions

Final Act Signed Act · 7 edits · Jun 4, 2026
MODERATE
The bill was converted from a draft legislative text to a final signed act, adding official signatures and correcting formatting errors. Substantively, the text includes new definitions for covered power plants, mandates emission limits for nitrogen oxides and sulfur dioxide after 2034, and requires quarterly reporting and cost estimates from utility owners.
Scope change
The bill applies to electric generating units in Colorado that emit significant amounts of nitrogen oxides or sulfur dioxide in 2024, specifically excluding plants that burn only natural gas/fuel oil or have specific pollution control systems installed.
DEFINITION

Defined 'covered electric generating units' as those emitting 200+ tons of nitrogen oxides or sulfur dioxide in 2024, while excluding plants burning only natural gas or fuel oil.

REQUIREMENT

Required the Public Utilities Commission to establish emission limits for nitrogen oxides and sulfur dioxide for covered units after December 31, 2034.

ENFORCEMENT

Mandated that covered units install specific pollution control systems by December 31, 2034, if they plan to operate beyond that date.

REPORTING

Required owners or operators to submit quarterly emission reports to demonstrate compliance with the new rules.

TECHNICAL

Added requirements for utilities to include cost estimates for compliance in their electric resource plans or public evaluations.

TIMELINE

Set a deadline of July 2029 for the Division to propose final emission rules and August 1, 2029, for the Commission to submit a list of units subject to federal energy orders.

SCOPE

Added an exemption for covered units that cease operations or convert to burning only natural gas, fuel oil, or both before December 31, 2029.

Floor votes · Senate May 7, 2026 · House Apr 22, 2026

How they voted

4122
Passed · 1 other
Total votes 64
May 7, 2026
D Democratic42
41 Yea 1
97% Yea
R Republican22
22 Nay
100% Nay
Vote distribution
All Yea All Nay Mixed No data
Full legislative history

Actions timeline

Total actions
17
Key actions
8
Committee
3
Amendments
2
Jun 4, 2026
Signed into law
Governor Signed
executive
Jun 3, 2026
Upper · Passed
Signed by the President of the Senate
upper
Jun 3, 2026
Lower · Passed
Signed by the Speaker of the House
lower
May 7, 2026
Introduced
House Considered Senate Amendments - Result was to Concur - Repass
lower
May 7, 2026
Senate · Passed
Senate Vote: pass (41-22-1)
senate
May 6, 2026
Introduced
House Considered Senate Amendments - Result was to Laid Over Daily
lower
May 5, 2026
Upper · Passed
Senate Third Reading Passed - No Amendments
upper
Apr 29, 2026
Upper · Passed
Senate Committee on Transportation & Energy Refer Amended to Senate Committee of the Whole
upper
Apr 24, 2026
Introduced
Introduced In Senate - Assigned to Transportation & Energy
upper
Apr 22, 2026
Lower · Passed
House Third Reading Passed - No Amendments
lower
Apr 21, 2026
Lower · Passed
House Committee on Appropriations Refer Amended to House Committee of the Whole
lower
Feb 26, 2026
Committee
House Committee on Energy & Environment Refer Amended to Appropriations
lower
Feb 18, 2026
Introduced
Introduced In House - Assigned to Energy & Environment
lower
25 primary · 16 co-sponsors

Sponsors