Air Permits for Colorado Business and Industry
Any business in Colorado that emits air pollution may be required to report its emissions and apply for a permit to emit. The type of permit needed is determined by the volume and type of emissions.
As of January 1, 2014, blank APENs will no longer be accepted by the Air Pollution Control Division. Additional fees will apply if an APEN is submitted to the Division without necessary information. If you need assistance, please refer to:
Obtaining an Air Permit
- Determine if You Need an APEN or Air Permit
- Select sources that emit less than certain thresholds may not need an APEN or Air Permit. Applicable APEN or permit exempt form letters are available for these sources if desired. This is a pilot project designed to eliminate the need for an engineer to review an application and issue an APEN or permit exempt letter for certain source categories.
- Construction Permits
- New and existing businesses in Colorado that emit air pollutants above certain threshold levels may trigger the need for an air permit called a "Construction Permit". These are issued through the Air Pollution Construction Permit Unit.
- Construction Permits for Oil and Gas Facilities
- The Oil and Gas industry construction permitting process has been developed specifically for that industry.
- Operating Permits
- All major sources of air emissions in Colorado are required to obtain an Operating Permit. These sources emit pollutants beyond the level required for a construction permit only. New major sources must first obtain a construction permit, and must apply for an operating permit within 12 months of commencing operation. Also called the Title V Operating Permit Program.
- General Permits
- Permit Public Notices
- This page contains public notices for current permit actions of the Air Pollution Control Division. Facilities are listed alphabetically, followed by the public notice documents in Adobe PDF format.
- Check Permit Status
- Check the Status of a Construction Permit
- View issued Operating Permits
- Field Services Unit
- This unit is responsible for compliance and enforcement. Information regarding inspections, emissions monitoring, reporting, open burning, tank trucks, and enforcement action reports are available here.
Air Permit Guidance and Information