Reminders:
- Permit application rejection criteria - use Form APCD-100 to avoid incomplete permit applications. Learn more.
- View the Environmental Justice Summary Requirement for Air Quality Regulation 3 started July 15, 2023.
- New reasonably available control technology (RACT) requirements start January 2024. Learn more.
- Learn more about the New air monitoring requirements start July 2024.
Non-oil & gas
Your application will be rejected if it is filled out incorrectly, missing information, missing required forms, or lacks payment for the filing fee. Form APCD-100 and all applicable forms on that checklist are required with every application. The re-submittal will require a new filing fee. See the Application Rejection Frequently Asked Questions page for more information.
The following application types are exempted from the requirement to submit the Permit Application/Registration Checklist (Form APCD-100):
- Air Pollutant Emission Notice (APEN) updates only (no changes to permit).
- Renewal of 5-year APEN term.
- Update to actual annual emissions, per AQCC Reg. 3, Part A, Section II.C.
- APEN exempt sources.
- Permit exempt sources.
- Administrative permit amendments
- Including but not necessarily limited to name changes, changes in contact information, transfers of ownership, and typographical error corrections.
Use APCD-200 if an APEN specific to your equipment is not available below.
Frequently asked questions: Updated landfill rules under Emission Guidelines Cf and New Source Performance Standards XXX.
NSPS IIII Addendum Form for Diesel Engines Form APCD-214
APEN and permit applicability resources
Learn more if you need an APEN or air permit on our web page.
Includes:
- Introduction to APENs video.
- Detailed guidance for calculating your emissions.
- APEN/permit threshold table.
- Ozone non-attainment area boundaries.
- Common APEN or air permit exemptions.
- APEN update guidance.
PS Memos Permitting guidance memos.
- Alternate operating scenario for engines.
- APCD-103: Notice of startup.
- Visit the Electronic submission web page for more information and to submit the form online.
- APCD-104: Permit transfer of ownership.
- APCD-106: Company name change.
- APCD-107: Cancellation request.
- Relocation notice for portable sources.
- Self-certification forms.
General Permits
General permit application and fee information
Final approval, self-certification and O&M plans.
- Compliance test manual.
- Continuous monitoring system guidelines.
- Portable analyzer monitoring protocol.
- Rolling 12-month emission calculation guidance.
- Malfunction/upset reporting.
- Gasoline tank truck certification information and form.
- APCD enforcement and inspection contacts.
Emission reduction credits (ERC).
- ERC stakeholder presentation
- Forms to apply for ERCs, use ERCs, or change ownership of ERCs
- Frequently asked questions
- Fact sheet
Gasoline Tank Truck Requirements
Guidance and information for tank truck certification
Resources
- Air emissions from business and industry.
- APENs and air permits.
- Compliance and enforcement.
- Index of oil & gas.
- Forms, guidance, APENs, memos.
- Records requests.
- Permit processing status.
- Small Business Assistance Program (SBAP).
Contact us
Questions?
For APEN-specific questions, email cdphe_apcd_ssp_application@state.co.us.
For general questions, email cdphe.commentsapcd@state.co.us.
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