Construction permit forms and Air Pollutant Emission Notices (APENs)
Any business in Colorado that emits air pollution may be required to report its emissions and apply for a construction permit to emit. The type of permit needed is determined by the volume and type of emissions. For more information:
We realize that some of the requirements may be difficult to understand, and the Small Business Assistance Program
has been established to help small businesses comply with these requirements. If you're a small business, please call
303-692-3175 or 303-692-3148 for information on completing the application and supplemental forms.
Additional fees will apply if a form or notice is submitted without necessary information. Use only official forms supplied by us.
Air Pollutant Emission Notice (APEN) forms
- Oil and gas specific forms and process.
- General APEN.
- APEN addendum for non-criteria reportable pollutants.
- Specialty APENs.
- APEN supplement forms.
Notice of startup, transfer of ownership, source relocation, permit cancellation request, malfunction reporting