Air Pollution Control Division: Public participation opportunities
On this page: Upcoming public participation opportunities | Public Meetings | Open public comment periods | Meeting accommodation notice | Current projects | Get involved: Air permit public notices | More ways to engage with the state of Colorado | Colorado air quality regulation updates | 10 tips for making effective public comments | Stay informed | Contact us
The air division wants your feedback
Do you get the information you need from the air division? Would you like to receive it in a different way? How do you feel about the way that the division holds its virtual public meetings? The division wants your feedback to ensure it is meeting your community’s needs in the best possible way. Please share your thoughts to help us better serve you through the Public Engagement Feedback Survey. Thank you in advance for lending your voice.
Upcoming public participation opportunities
Below are ongoing and upcoming public participation opportunities with the Air Pollution Control Division. These events may be in-person, virtual, or hybrid. The division holds regular events such as public meetings, tutorials, and more. The division uses these meetings to share updates, learn from community experiences, and incorporate feedback into our work protecting clean air for all Coloradans.
Questions? Contact cdphe_apcd_outreach@state.co.us. Please include the meeting topic in the subject line.
Public meetings
The air division’s public meetings provide an opportunity to learn more about air quality and climate change topics. These meetings generally allow anyone to ask questions and provide feedback directly to the division. Register for upcoming public meetings below to join and learn more.
Oil and gas emission control updates
Join a public meeting to learn the division’s proposed updates to controlling pollution in the oil and gas industry. The proposals would include revisions to Air Quality Control Commission Regulation 7 and Regulation 19. The division will also share a brief update on controlling lead hazards.
Register to join an upcoming meeting:
Lawn and garden in-use requirements
Join a public meeting to learn the division’s planned proposal to expand requirements for lawn and garden equipment. Colorado currently has lawn and garden equipment requirements for government agencies in place, and the proposal would expand requirements to commercial operators. The proposed rule would include revisions to Air Quality Control Commission Regulation 29. The regulation aims to reduce emissions that form ground-level ozone pollution in the parts of Colorado that do not meet federal standards.
Register to join an upcoming meeting:
Lawn and garden in-use requirements
Join a public meeting to learn the division’s planned proposal to expand requirements for lawn and garden equipment. Colorado currently has lawn and garden equipment requirements for government agencies in place, and the proposal would expand requirements to commercial operators. The proposed rule would include revisions to Air Quality Control Commission Regulation 29. The regulation aims to reduce emissions that form ground-level ozone pollution in the parts of Colorado that do not meet federal standards.
Register to join an upcoming meeting:
Oil and gas emission control updates
Join a public meeting to learn the division’s proposed updates to controlling pollution in the oil and gas industry. The proposals would include revisions to Air Quality Control Commission Regulation 7 and Regulation 19. The division will also share a brief update on controlling lead hazards.
Register to join an upcoming meeting:
Oil and gas emission control updates
Join a public meeting to learn the division’s proposed updates to controlling pollution in the oil and gas industry. The proposals would include revisions to Air Quality Control Commission Regulation 7 and Regulation 19. The division will also share a brief update on controlling lead hazards.
Register to join an upcoming meeting:
View past public participation and outreach opportunities. These serve as a historic archive. These processes are completed.
Open public comment periods
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.
The division released the General Permit 12 (GP12) draft for a 30-day public comment period for well production facilities. The division will accept and consider all comments and feedback through Feb. 4. The GP12 provides a voluntary mechanism for companies to obtain an air permit to authorize the construction of well production facilities.
The division has released the new Emission Reduction Credit (ERC) Guidance Document draft for a 30-day public comment period. The division will accept and consider all comments and feedback through Feb. 16. The ERC application forms are also now available for immediate use.
Learn more about Emission Reduction Credits (ERCs) and submit comments on the draft guidance.
Meeting accommodation notice
Auxiliary aids and services for individuals with disabilities may be provided upon request. Please notify cdphe_apcd_outreach@state.co.us and the Nondiscrimination Coordinator at cdphe_nondiscrimination@state.co.us or 303-692-2102 at least one week prior to the meeting to make arrangements.
Current projects
Environmental Justice Summary Dashboard
Most air pollution sources in Colorado must submit an environmental justice summary before applying for an air permit. That means environmental justice summaries provide early notice before the division receives an air permit application. The environmental justice summary dashboard allows users to find a specific facility by name or enter a zip code for a list of recent submissions within a one-mile radius. Learn more about the Environmental Justice Summary Dashboard.
Air permits open for public comment
The division opens numerous air permits for public comment each month. The division encourages anyone interested in air permits to visit the air permits public notices web page and sign-up to receive email updates by subscribing to Air Permit Public Notices. The division also shares upcoming public participation opportunities on its website and tips for submitting effective public comments.
Annual air quality enforcement report
The division released a new annual enforcement report in January 2026. The annual report covers enforcement actions, penalties and trends between October 2024 and September 2025. It builds on the information previously summarized in the division’s federal fiscal year 2024 annual report and December 2024 five-year benchmark report. Learn more about the division’s enforcement reporting on the settlements and orders web page.
Get involved: Air permit public notices
Visit the air permit public notices web page to:
- Submit public comments on individual air permits.
- Sign up for email notifications about air permit public notices and comment periods.
- Learn about, request, or register for public comment hearings on air permits.
More ways to engage with the state of Colorado
For a calendar of upcoming community engagement opportunities across the Colorado Department of Public Health and Environment, visit the department’s public participation website.
If you have questions or need to contact the air division, visit the division’s contacts website.
For upcoming Air Quality Control Commission public participation opportunities, visit the AQCC website.
For upcoming Colorado Energy and Carbon Management Commission hearings and public participation opportunities, visit the ECMC website.
For upcoming Public Utilities Commission hearings and public participation opportunities, visit the PUC’s website.
Colorado air quality regulation updates
The Air Pollution Control Division periodically proposes updates to existing air quality regulations to the Air Quality Control Commission. Prior to submitting a formal proposal to the commission, the Division will publish regulatory concepts on this website. Once a formal proposal is submitted, the commission reviews the proposals and determines whether to adopt any changes.
Many of these changes are minor or administrative. The division provides quick updates about these changes during public meetings. The commission’s website provides a calendar of upcoming meetings and more information on meeting topics.
The public can also learn more during the commission’s hearing requests and hearings. Visit the commission’s website and meeting calendar for more information.
To submit written public comments, email:
- cdphe.commentsapcd@state.co.us before a commission hearing request.
- cdphe.aqcc@state.co.us after a commission hearing request.
- Please include the Regulation Number “Public Comment” in the subject line.
Upcoming regulatory concepts or proposed changes to existing Colorado air quality regulations include:
- Proposed updates include:
- Revisions to reduce duplicative emissions reporting requirements.
- Revisions to fees associated with APEN submittals, permit processing, annual criteria pollutant emissions, annual Hazardous Air Pollution emissions, and potentially other application materials submitted to the division.
- Regulatory concepts:
- Hearing request date: Jan. 15, 2026
- Submit feedback. Submit written feedback on the proposal to cdphe.commentsapcd@state.co.us. Include “Air emissions reporting and fees Public Comment” in the subject line. The division’s proposal is subject to change based on feedback from the public and stakeholders.
- Questions or comments? Email cdphe.commentsapcd@state.co.us.
- Proposed updates include:
- Revisions to particulate matter 10 with a diameter of 10 microns or less (PM10) maintenance requirements in Colorado.
- Changes to remove federal oversight of PM10 requirements as a result of maintaining the PM10 standard in each of Colorado’s PM10 maintenance areas for over 20-years.
- Regulatory concepts:
- Questions or comments? Email cdphe.commentsapcd@state.co.us.
- Proposed updates include:
- Potential revisions to the Air Quality Control Commission’s Regulation 7.
- Applies to certain "designated facilities" identified in EPA's oil and gas Emission Guidelines and New Source Performance Standards that would reduce methane emissions.
- Regulatory concepts
- Hearing date: Feb. 18-20, 2026.
- Questions or comments? Email cdphe.aqcc@state.co.us before the hearing date above.
- Proposed rule revisions include:
- Aligning requirements and deadlines across state regulations.
- Clarifying certain requirements.
- Improving requirements for data completeness and accuracy.
- Increasing flexibility to meet requirements.
- Providing more transparency around the program.
- Regulatory concepts:
- Questions or public comments? The division requests feedback on these concepts by Jan. 5, 2026. Email your comments to climatechange@state.co.us. Include “Regulation 27 rule concept” in the subject line.
- Proposed updates include:
- Potential revisions to the Air Quality Control Commission Regulation 30, as well as potential revisions to Regulations 24 and 26.
- The revisions will include emission control strategies and associated requirements for each identified priority toxic air contaminant: benzene, ethylene oxide, formaldehyde, hexavalent chromium, and hydrogen sulfide.
- Regulatory concepts:
- Rulemaking concepts document.
- Regulation 30 draft.
- Data files with potentially impacted facilities and census blocks with modeled cancer risk from priority toxic air contaminants.
- Updated petition for proposed rulemaking and other official commission filings.
- Hearing date: April 15-17, 2026.
- Questions or public comments? Email cdphe.aqcc@state.co.us before the hearing date above.
- Proposed updates include:
- Establishing a new Regulation 31, which will address municipal solid waste landfill greenhouse gas control and monitoring requirements.
- Hearing date: Dec. 17-19, 2025
- Continuation from Aug. 20-22, 2025.
- Questions or public comments? Email cdphe.aqcc@state.co.us before the hearing date above.
Thank you for your interest in submitting comments to the air division. To protect public health and improve Colorado’s air quality, the division may present rules, permits, guidance documents, and other updates to communities so they can share their feedback and ask questions.
Our team values and considers every comment we receive.
Explore our web page. These tips are for written comments but can also be helpful when planning oral comments for a public meeting.
Questions? Email us at cdphe.commentsapcd@state.co.us.
Stay informed
Sign up for General Air Division Updates or a particular topic of interest. You’ll be one of the first to know about upcoming public participation opportunities.
- Join the air quality compliance and enforcement updates to learn about enforcement actions by the division.
- Join the air permit public notice list to receive updates on environmental justice summaries and permits open for public comment.
Contact us
Questions? Contact cdphe_apcd_outreach@state.co.us.
Stay informed. Subscribe to receive email updates from the division.