Title V operating permits

New or Updated Information


Modeling Requirement Changes

Effective September 7, 2022 the Division has published new information regarding National Ambient Air Quality Standards (NAAQS) compliance demonstrations for permits which may be relevant to any Title V permit actions. Before submitting any modification application for a Title V permit, please review the Division's Permit Modeling Unit Guidance and Sections 2.1 and 3.4 of the Modeling Guidance Addendum for additional information.

Failure to follow these procedures may result in the delay in processing, or denial of your permit modification application. If you have any questions concerning modeling or the modeling guidance, please contact the Permit Modeling Unit at cdphe_apcd_modelingdeterminations@state.co.us or see the the Permit Modeling Unit's website for more information.

Title V Resources


About Operating permits

The about operating permits site provides a brief overview of the title V program. It also includes the criteria used to determine whether or not Title V is applicable to a specific facility.

Operating permits Index by company

This site allows the user to access any currently issued Title V permit, as well as any historical Technical Review Document for the given operating permit.

Air Permitting PS Memos

This site allows the user to access various air permitting memoranda that impact the processing of applications in the APCD.


How to Submit a Title V Application

Always Check the Web Page First for Newest Information and Revised Forms

We revise our forms and processes frequently. Be sure to check the webpage before you prepare each application to ensure you have the most up-to-date forms and are following current instructions.


Currently, you must mail a hard copy with signatures to the Division, in addition to following the electronic submittal procedures below. We will establish the received date for your application as the earliest of the hardcopy or electronic submittal. We are working on updating our processes to eliminate hard copy submittals in the future.

The current mailing address to be used is as follows:

Colorado Department of Public Health and Environment
Air Pollution Control Division
Operating Permits Unit
4300 Cherry Creek Drive S.
Denver, CO 80246-1530
ATTN: Title V Unit Supervisor

  • A single pdf file that represents the complete application, including signatures. The signatures may be digital or scanned ink signatures.
    • DO include all forms
    • DO include the cover page, if you are submitting one
    • DO include all calculation sheets, diagrams, maps, supplemental narrative, or any other pages that you consider part of the application, in addition to forms.
    • DO NOT include copies of checks or payment receipts (these can be attached as separate documents to the email). Note there is no filing fee for Title V applications, and no payment is required unless the submittal also includes a new/revised APEN.
    • DO NOT include copies of APENs previously submitted to the division. APENS are only needed if you are requesting to add new equipment or modify existing equipment.
    • DO NOT mark pages as “Trade Secret,” “Confidential Business Information” etc. unless the information meets the Division-specific definitions of Confidential Business Information. You will be required to submit both redacted and unredacted versions. Contact the Title V unit for questions on CBI.
  • The forms also must be submitted individually in word format (either .doc or .docx)
  • Attach all documents in an email to cdphe_apcd_title_v@state.co.us
  • You may zip files before attaching
  • It is helpful if you note the type of submittal in the subject line or body of your email (e.g., Initial Application, Renewal Application, Minor Mod Application, Application Supplement, etc.)

No. The division is no longer accepting applications using antiquated forms. Please ensure you have checked the Operating Permit Forms section for the most up to date version of the forms before submitting your application.


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Operating Permit Forms

How to Use Title V Forms

This section is intended to provide general instructions for use of the State of Colorado Air Pollution Control Division (the Division) Title V forms. Note that for most of the Title V forms there is an instruction sheet specific to each form which will go in depth with information specific to that form.

The Title V forms are built in Microsoft Word; the documents are locked with the exception of all of the data entry fields (content controls). The content controls allow the Division to populate an Operating Permit template using the information provided in the forms. This will allow the Division to more efficiently draft the permit and reduce costs for the applicant. The forms are not macro-enabled for security reasons and are available in a .docx format.

Please note that if you want to copy and paste from one content control to another, do not use the default “Ctrl+V” to paste, instead use the “Paste” options in the top left of the “Home” tab to paste as “Keep Text Only” as follows:

Disclaimer: While the Division strives to create forms that encompass most facility operations, it is unrealistic that the forms will accommodate all operations. If the forms don’t seem to work for a particular application, the permittee should contact the Division and work with a permit engineer on how to complete the application.

  • The document will open in a “read-only” format when opened from the website. Under the “View” tab on the top ribbon, select the “edit document” option. The content controls are now able to be edited.

  • The documents are “locked” to protect inadvertent deletions. While the documents are locked, data entry into content controls are the only things that can be edited in the forms.
  • Click on the content control to modify the content
  • The applicant may use the up and down arrow keys or “tab” button to move through the content controls to fill out the form
  • The boxes will move and re-size automatically to accommodate the text in the content controls. If the applicant finds that a box has become distorted as seen below, add spaces in the text and the box will re-size. See example below:

Stretched-out Box

Putting Spaces in Name

  • AIRS ID: On some of the forms, the AIRS ID is listed in the top right corner and in the footer of the forms. Once the applicant fills out the AIRS ID in the top right of the first page, the AIRS ID in the footer will update when the document is saved, closed, and reopened, or if “print preview” is enabled.
  • Creating Paragraphs/Line Breaks Within Content Controls: Pressing “Shift+Enter” inserts a new line
    inside a content control box.
  • Repeating Content Controls: Several sections (listing pollutants, control device table, etc.) have the option to use the  button to re-create another section. Click the table or row and hover over the bottom right corner until the plus symbol appears. Clicking it will add additional rows and/or tables with content controls. The individual instruction documents for the forms will note when the  is available to use. In the event that the plus symbol does not appear or is not working, the applicant may attach
    pages with the additional information.


  • When entering dates into the forms, please use the format MM/DD/YYYY (numbers only) for ease of use by the Division. Where a date is not specifically known, enter an approximate date and include a note regarding the approximation, where appropriate.
  • If you have any questions which are not addressed in this document, contact your permit engineer. If the facility has not yet been assigned an engineer, please reach out to the Operating Permit Unit Manager at cdphe_apcd_title_V@state.co.us or (303) 692-3100.
  • The Division is requiring one hardcopy submittal mailed to the Air Pollution Control Division and electronic copy submittal emailed to the Air Pollution Control Division to cdphe_apcd_title_V@state.co.us. The electronic submittal must contain the following:
    • The source must submit a complete PDF of the full application including all signature pages which shall contain either adobe digital signatures or a scanned ink signature.
    • Individual forms must also be submitted in word format (either .doc or .docx)
  • The Division suggests saving the Forms with the following naming conventions:
    • OP-301 S004.docx (using facility identifier)
    • OP-311 AIRS 001.docx (using AIRS ID)
    • Emission Calculations S001.pdf (for any attachments)
      • Attachments are welcome to be submitted in any format
    • OP-201 Minor Modification S001
  • The date received by the Division will be the date the complete and signed digital copy is received in theTitle V email box.

Operating Permit Form Applicability Matrix and Download Links

Click the following links to download individual form series. Refer to the “Application Form Applicability Matrix” above for more information on which forms are required for a complete Operating Permit Application.

This applicability matrix is also available for download in the Downloadable Guidance Documents Section.

Please download files and fill out using Microsoft Word, instead of opening files using Google Docs.

Title V Application Forms

Current as of: August 31st, 2021

Download a zipped file of all operating permit forms and instruction sheets.

50 Series - Application forms.

100 Series - Administrative forms.

200 Series - Miscellaneous forms.

200 O&G Series - Oil and Gas specific.

300 Series - Emission Unit forms.

400 Series - Compliance and Monitoring form.


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Frequently Asked Questions


In addition to the guidance below, please also refer to our Electronic Reporting Policy for more information.

  • “MACT” refers to Maximum Achievable Control Technology (also known as NESHAP - National Emission Standards for Hazardous Air Pollutants) requirements in 40 CFR Part 63
  • “NSPS” refers to New Source Performance Standards requirements in 40 CFR Part 60

Title V Reports

Send the following reports to the Division at cdphe_apcdreports@state.co.us. The reports should be in .pdf format and should include the appropriate digital signature or scanned ink signature. Do not send duplicate hard-copy reports to the Division.

  • Semiannual Monitoring and Permit Deviation Reports (SARs)
  • Annual Compliance Certification Reports (ACCs)

Landfill Reports

Send the following landfill reports to the Division at cdphe_apcdreports@state.co.us. Do not send duplicate hard-copy reports to the Division.

  • NSPS Cf (NMOC) reports
  • MACT AAAA (NESHAP) reports
  • NSPS XXX and XXX liquid addition reports
  • Initial and updated Gas Collection and Control System Design Plans (GCCS)
  • Initial and updated Design Capacity Reports
    • Updated Design Capacity Reports that require submission with an APEN should come to this email address separate from the APEN
    • Submit the APEN to the Division by hard copy
  • Corrective Action Timeline Requests/Alternative Timeline Requests
  • Landfill Tier 2 and 3 reports should be sent to the Compliance Testing email, as noted below. Landfill Tier 4 reports should be sent to EPA Region 8.

Compliance Testing Protocols and Reports

Send the following reports to cdphe_apcd_compliancetesting@state.co.us. Do not submit hard copies of these reports to the Division.

  • Excess Emission Reports (EERs)
  • Stack test and CEMS Performance Evaluations protocols
  • Stack test and CEMS Performance Evaluation reports
  • CEMS monitor certification/recertification documents
  • Landfill Tier 2 and 3 Protocols and Test Reports

MACT and NSPS Reports

Send the following MACT/NSPS reports to CEDRI/CDX, following the procedures specified. Do not submit hard copies and do not email a copy of these reports to the Division (the Division will be notified separatly through CEDRI/CDX that the reports were submitted). 

  • 40 CFR Part 63, Subpart DDDDD (Industrial, Commercial, and Institutional Boilers and Process Heaters at Major Sources)
  • 40 CFR Part 63, Subpart EEEEEEE (Gold mine processing and production, at area sources)
  • 40 CFR Part 63, Subpart JJJJJJ (Industrial, Commercial, and Institutional Boilers at area sources)
  • 40 CFR Part 63, Subpart LLL (Portland Cement Manufacturing Industry)
  • 40 CFR Part 63, Subpart UUU (Petroleum Refineries)
  • 40 CFR Part 63, Subpart UUUUU (Coal and Oil-Fired Electric Utility Steam Generating Units)
  • 40 CFR Part 63, Subpart ZZZZ (Reciprocating Internal Combustion Engines)
  • 40 CFR Part 60, Subparts OOOO and OOOOa (Crude Oil and Natural Gas Facilities); please also see the Regulation No. 7 guidance below

Send all other MACT and NSPS reports not specified above to the Division at cdphe_apcdreports@state.co.us.

Other Reports

At this time, the Division is allowing the electronic reporting specified in the "Where and how do I submit reports?" question above to meet the requirements for report submittals in issued operating permits.


Responsible Official, Billing Contact and Permit Contact

Send forms OP-50 and OP-100 to cdphe_apcd_title_v@state.co.us. You must check Box 5.A, but do not need to check any of the options in Box 5.B or 5.C. Please also send this submittal via mail to the address noted on the bottom of form OP-50. The Division is currently working on a process that will eliminate the need for hard copies of application submittals and responsible official notifications.

Yes. Send a responsible official notification, as specified in the "How do I change the Responsible Official" question. Attach a cover letter specifying the authorized representative.

Submit forms OP-50 and OP-100 as noted in the "How do I change the Responsible Official" question.



Please consult the flowchart below to determine which type of permit action your requested change qualifies as.


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Contact Information

Questions, comments, or concerns? Contact us at (303) 692-3100 or cdphe_apcd_title_v@state.co.us 

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