Air Pollution Control Division: Public participation opportunities

Ozone public meetings

The CDPHE Air Pollution Control Division is holding public meetings in June addressing ground-level ozone pollution. These meetings are set before a request for a hearing by the Air Quality Control Commission for proposed updates to Colorado’s State Implementation Plan.

Join an upcoming public meeting to learn more and share your thoughts on ozone pollution reduction efforts. 

• Virtual event: Wednesday, June 4, 6 p.m.-8 p.m.

For background information on ozone, please visit our Ozone 101 presentation. Materials can be found below for reference.

• Presentation | Recording

Guzman Energy Clean Energy Plan public meeting

The division released the draft report for public review and feedback on the Clean Energy Plan for Guzman Energy.

The division will accept public comments through June 18, 2025. 

• Send your comments to: cdphe.commentsapcd@state.co.us 
• Use subject line: CEP verification comments. 

Learn more on the climate change web page.

Join an upcoming public meeting to learn about the Guzman Energy Clean Energy Plan verification report. The division will provide an overview of the draft verification report and the emissions reductions projected through 2030 for customers of Guzman Energy.

Virtual event: Wednesday, June 11, 11 a.m. - 12 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 Nitrogen Oxides (NOx) Reduction Steering Committee began meeting in March 2024. The members committed to holding meetings once a month for at least six months. During these meetings, members engage in technical discussions on potential strategies to reduce NOx pollution. The focus is on reducing NOx emissions from oil and gas exploration and production processes in Colorado. 

Meetings are held virtually. Members of the public are welcome to observe. 

For more information about meeting dates and how to register, visit the reducing nitrogen oxides from oil and gas web page. 

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.

Guzman Energy Clean Energy Plan: Public comments through June 18, 2025

The division released the draft report for public review and feedback on the Clean Energy Plan for Guzman Energy.

The division will accept public comments through June 18, 2025. 

• Send your comments to: cdphe.commentsapcd@state.co.us 
• Use subject line: CEP verification comments. 

Learn more on the climate change web page.

Join an upcoming public meeting to learn about the Guzman Energy Clean Energy Plan verification report. The division will provide an overview of the draft verification report and the emissions reductions projected through 2030 for customers of Guzman Energy.

Virtual event: Wednesday, June 11, 11 a.m. - 12 p.m.

Outdoor air monitoring plan and assessment: Public comments through June 23, 2025

The 2025 Ambient Air Monitoring Network Plan and the 2025 Network Assessment have been released for public comment. The documents evaluate Colorado’s statewide network of outdoor air pollution monitoring stations and are required by the EPA under Title 40, Code of Federal Regulations, Part 58.10.

The Annual Network Plan outlines the department's ambient air monitoring strategy. This includes the purpose and siting of monitors, pollutant measurements, recent and planned site changes, and areas of highest pollutant concentrations. The division will accept public comments through June 23, 2025.

• Send your comments to: cdphe.commentsapcd@state.co.us. 
• Use subject line: Annual Network Plan public comment.

The division conducts the Network Assessment every five years, which builds on the Annual Network Plan and includes a more in-depth analysis of the monitoring network. This includes a re-evaluation of monitoring objectives and priorities, an assessment of network efficiency and effectiveness, and recommendations for potential improvements. The current assessment is the division’s fourth such evaluation. The division will accept public comments through June 23, 2025. 

• Send your comments to:cdphe.commentsapcd@state.co.us.
• Use subject line: Five-year network assessment public comment.

• 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 request date: May 15, 2025
  • Questions or public comments? Email cdphe.aqcc@state.co.us before the hearing date above.
• 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.