co-co-2026-00503: REGULATION NUMBER 3 STATIONARY SOURCE PERMITTING AND AIR POLLUTANT EMISSION NOTICE REQUIREMENTS

Code of Colorado Regulations eDocket Skip to content  |  About Secretary Griswold  |  Español   Home  Colorado Revised Statutes  Search  Browse  Colorado Register  eDocket  Log in  Contact Us Code of Colorado Regulations eDocket Official Publication of the State Administrative Rules (24-4-103(11) C.R.S.) Details of Tracking Number   2026-00503 Filing pending. Attachments will be available for download after they are approved for accessibility. CCR details Tracking Number 2026-00503 Type of Filing Permanent Rule Department 1000 Department of Public Health and Environment Agency 1001 Air Quality Control Commission CCR Number 5 CCR 1001-5 CCR Title REGULATION NUMBER 3 STATIONARY SOURCE PERMITTING AND AIR POLLUTANT EMISSION NOTICE REQUIREMENTS Proposed rule Notice Filed with SOS 10/16/2026 Rule ProposedRuleAttach2026-00503.docx Additional Information AddInfoAttach2026-00503.docx Statutory Authority §§ 25-7-101, 25-7-105, 25-7-109, 25-7-106, 25-7-109, 25-7-114.1, 25-7-114.7, 25-7-140 Description of Subjects/Issues The Air Quality Control Commission (Commission) will hold a rulemaking hearing to consider revisions to Regulation Number 3 to (1) minimize duplicative emissions reporting requirements for entities filing annual emissions reports under Regulation Number 3 through an Emissions Reporting Notice; (2) to improve accuracy of annual emissions reporting to require reporting of potentially emitting equipment; (3) to require Air Pollutant Emission Notices for emergency and/or backup generator engines at data centers; and (4) to adopt new and revise existing fees consistent with Sections 25-7-114.1, C.R.S., and 25-7-114.7, C.R.S. The Commission will also consider revisions to Regulation Number 7 to (1) improve accuracy of annual emissions reporting to require reporting of all potentially emitting activities and equipment and certain start-up and shut-down emissions and (2) require use of Division-approved protocols for calculating emissions reductions or generating credits for carbon capture and storage projects. The Commission will also consider adding or updating references to materials incorporated by reference throughout Regulation Number 3. The proposed revisions may include both state-only and state implementation plan (SIP) revisions and may include clean-up, correction, and/or clarification revisions. Comments Public Hearing Schedule: Date: February 17, 2027 Time: 4:30 p.m. to 7:30 p.m. Place: The session will be held online only; there will be no in-person participation. Details related to participation and registration can be found at: https://cdphe.colorado.gov/aqcc Date: February 18 & 19, 2027 Time: 9 a.m. on February 18 and on or after 8:00 a.m. on February 19. Place: The hearing will be held in hybrid fashion both in-person and via Zoom. Details related to participation and registration can be found at: https://cdphe.colorado.gov/aqcc-public-participation-and-hearing-guidance The hearing may be continued at such places and time as the Commission may announce. Any such changes will be noticed on the Commission’s website. Interested parties may contact the Commission Office at cdphe.aqcc@state.co.us to confirm meeting details. Submitted in response to issues raised by COLS/OLLS? Is this rule adopted in response to recent legislation? Hearing Date 02/17/2027 Hearing Time 04:30 PM Hearing Location 4300 Cherry Creek South Drive, Denver, CO, Colorado 80246 Contact Name Leah Martland Contact Title Regulatory Development and Supervisor Contact Telephone 303-692-6269 Contact email leah.martland@state.co.us Adopted rule Adopted Rules Redline AGO requested date          Terms & conditions | Accessibility statement | Browser compatibility