AQCC upcoming, current and recent commission hearings
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Upcoming, Current and Recent Commission Hearings
Rulemaking Hearing: Regulation Number 3 - Permitting and Emissions Reporting, Regulation Number 7 - Emissions Reporting
May 20-22, 2026
Rulemaking Hearing: Regulation Number 29 - Lawn and Garden Equipment Emissions Reductions
May 20-22, 2026
Rulemaking Hearing: Regulation Number 24, 26 & 30 - Toxic Air Contaminants
April 15-17, 2026
Request Rulemaking Hearing - Regulation Number 27 - Manufacturing Sector Greenhouse Gas Emissions Standards
February 18-20, 2026
Public Hearing: Regulation Number 9: Boulder County Parks & Open
Space
February 18-20, 2026
Request Rulemaking Hearing: Particulate Matter (PM10) Maintenance Plan Revisions
February 18-20, 2026
Rulemaking Hearing: Regulation Number 7 - Oil & Gas Operations
February 18-20, 2026
Request Rulemaking Hearing: Regulation Number 29 - Lawn and Garden Equipment
Emissions Reductions
January 15, 2026
Request Rulemaking Hearing: Regulation Number 3 - Permitting and Emissions Reporting, Regulation Number 7 - Emissions
January 15, 2026
Request Rulemaking Hearing: Regulation Numbers 24, 26 & 30 - Toxic Air Contaminants
December 17-19, 2025
Rulemaking Hearing: Landfill Methane Regulation - Regulation Number 31
December 17-19, 2025 (continued from August, 2025)
Request for Public Hearing: Regulation Number 9: Boulder County Parks & Open Space
December 17-19, 2025
December 9 & 13, 2025 - These will be joint meetings where public comments on both permits will be heard
Rulemaking Hearing: Ozone State Implementation Plan (SIP) and Associated Regulations
November 19-21, 2025
Public Hearing: Secondary SO2 Design
October 15-17, 2025
Adjudicatory Hearing - Edge Environmental LLC
October 15-17, 2025
Written Rulemaking Hearing - Common Provisions
October 15-17, 2025
Written Rulemaking Hearing - Hazardous Air Pollutants Performance Standards - Regulation Number 8
October 15-17, 2025
Written Rulemaking Hearing - Stationary Source Performance Standards - Regulation Number 6
October 15-17, 2025
Rulemaking Hearing: Toxic Air Contaminants - Regulation Number 30
September 17-19, 2025
Rulemaking Hearing: Building Performance Standards - Regulation Number 28
September 17-19, 2025
Rulemaking Hearing: Landfill Methane Regulation - Regulation Number 31
August 20-22, 2025 - Continued to December 17-19, 2025
Public Comment Hearing: Public Service Company of Colorado
July 1, 2025
Public Comment Hearing: Holly Energy Partners - Operating, L.P. - Denver Products
April 24, 2025
Rulemaking Hearing: Permitting and Emissions Reporting - Regulation Numbers 3, 7
April 16-18, 2025
Rulemaking Hearing: Oil & Gas Operations - Regulation Number 7
February 19-21, 2025
Public Hearing: PM2.5
January 16, 2025
Rulemaking Hearing: Toxic Air Contaminants - Regulation Number 30
January 16-17, 2025
Rulemaking Hearing: Vehicle Emissions Inspections & Vehicle Diesel Emissions Inspections - Regulations Numbers 11, 12
January 16, 2025
Rulemaking Hearing: Ozone SIP - Regs 3, 7, 25, 26 & Air Quality Standards
December 18-20, 2024
Public Comment Hearing: Suncor Energy
December 10 & 14, 2024