Air Pollution Control Division: Public participation opportunities

Developing Colorado’s Industrial Decarbonization Fund

The division is holding two public informational sessions in July on the development of the state-managed Industrial Decarbonization Fund. Industrial decarbonization is reducing greenhouse gases from sites like steel mills, meat packing plants, or glass factories. The fund is required under Colorado Air Quality Control Commission Regulation 27. These sessions will provide an overview of requirements in Regulation 27 and the timeline for concept development, rule drafting, and stakeholder engagement.

Both public informational sessions will be held virtually over Zoom. Translation or interpretation services will be provided upon request. Verbal comments will not be accepted during this meeting. Written comments may be shared by emailing climatechange@state.co.us using the subject line “Industrial Decarbonization Fund.” Both meetings will cover the same information. Register to join a meeting:

• Tuesday, July 22, 2025, 2-3 p.m. 
• Wednesday, July 30, 2025, 6-7 p.m.

The division must propose an Industrial Decarbonization Fund under Colorado’s Greenhouse Gas Emissions and Energy Management for Manufacturing Phase 2 Rule, or GEMM 2. The division will present a proposal to the commission for consideration by the end of 2025.

Air toxics monitoring report

The division is holding public meetings in July to review the first year of the state’s air toxics monitoring program. The division installed monitors at three new air monitoring sites around Colorado to gather air toxics measurements. The division will share preliminary results and trends observed from these new air monitoring sites during 2024. The division is seeking input on what questions the public would like the division to try to address when the division publishes the report in October 2025. The new monitors and annual reports are required under House Bill 22-1244: The Public Protections from Toxic Air Contaminants Act.

Register for an upcoming public meeting to learn more and share your thoughts on what questions you would like answered in the draft report. Both meetings will cover the same information.

Air toxics monitoring report public meetings

• Thursday, July 24, 10 a.m.-12 p.m.
• Thursday, July 31, 6-8 p.m.

Oil and gas methane reduction public meeting

The division is considering revisions to AQCC Regulation Number 7 related to the "designated facilities" identified in EPA's oil and gas Emission Guidelines and New Source Performance Standards that would reduce methane emissions. The Division is also considering refinements related to the upstream oil and gas greenhouse gas provisions.

The July 26 meeting will also include potential updates to several Air Quality Control Commission regulations, listed below. These proposed updates would be primarily administrative in nature.

• Regulation 6, part A.
• Regulation 8, parts A & E.
• Regulation 28.
• Common provisions

Oil and gas methane reduction public meeting

• Virtual event: Saturday July 26, 10 a.m. to 12 p.m.

View past public participation and outreach opportunities. These serve as a historic archive. These processes are completed.

The division periodically presents rules, permits, guidance documents, and other updates to communities so they can share their feedback and ask questions. Public comment periods are a key part of this process, enabling Colorado residents to share their perspectives on proposed regulations and policies. The feedback supports the division’s work to protect public health and improve Colorado’s air quality.

New monitoring stations: public comments April 1-June 30, 2025.

The division is accepting input on its proposed locations for three new monitoring stations to measure air toxics in communities. As required by state law, the monitoring stations must operate within a 3 mile radius of covered facilities located in Commerce City, Henderson, and Pueblo. The new stations would build upon the division’s existing stationary and mobile air toxics monitoring program.

• Send your comments to cdphe.commentsapcd@state.co.us. 
• Use subject line: HB1189 Community Monitoring Site Comment.

Public comments will be accepted between April 1-June 30, 2025.

2025 annual sulfur dioxide draft report: Public comment open until June 27, 2025

The 2025 Annual sulfur dioxide draft report is available for public comment through June 27, 2025. Sulfur dioxide is a product of combustion, primarily from coal and diesel fuel. The report summarizes recent sulfur dioxide emissions at facilities. The division must track emissions from facilities as part of the federal Data Requirements Rule. The report shows Colorado is in attainment with the primary National Ambient Air Quality Standard (NAAQS) for sulfur dioxide, and no further modeling is necessary.

• Send your comments to: cdphe.commentsapcd@state.co.us 
• Use subject line: 2025 Draft Annual SO2 Report.

• Proposed updates include:
  • Establishing a new Regulation Number 31, which will address municipal solid waste landfill greenhouse gas control and monitoring requirements.
• Hearing date: August 21-22, 2025
  • Questions or public comments? Email cdphe.aqcc@state.co.us before the hearing date above.

• Proposed updates include:
  • The division will request that the Commission set a hearing to consider revisions to Regulation 28 to address technical corrections to the rule, specifically related to agricultural buildings, utility subscription services, and the annual fee deadline.
• Hearing date: September 17-19, 2025
  • Questions or public comments? Email cdphe.aqcc@state.co.us before the hearing date above.

• Proposed updates include:
  • Revisions to Regulation Number 30 to establish health based standards for the adopted priority air toxic contaminants, for General Assembly approval, in response to HB 22-1244. 
• Hearing date: September 17-19, 2025
  • Questions or public comments? Email cdphe.aqcc@state.co.us before the hearing date above.

• Regulatory Concepts - Questions or comments? Email cdphe.commentsapcd@state.co.us before the hearing request date below.
• Hearing request date: September 17, 2025