Oil and gas operators must submit annual emissions inventory reports to the Oil and Natural Gas Annual Emission Inventory Reporting (ONGAEIR) web-based portal by June 30 each year. The reports are required under Air Quality Control Commission Regulation 7, Part B, Sections IV and V. This webpage offers guidance and other resources to help with completing annual reports.
For 2023 ONGAEIR submissions due June 30, 2024, the revised reporting templates are available under 2023 reporting further down this page. Please ensure version 6.1 (6.1.1 for midstream and pipeline operations) is referenced in the downloaded file name to facilitate a successful submission validation process.
Questions? Email cdphe_apcd_ei@state.co.us.
Calculation methodology and emission factors
Sources with permitted methodologies for pollutants must use those to calculate pollutants. Refer to the Calculation Methodology: Guidance Document for more information.
Web portal access
Use the web portal access to submit annual emissions inventory reports for oil and gas as required under Air Quality Control Commission Regulation No. 7, Part D , Sections IV and V. A registered user account is required to access the submission form.
Forms and instructions are provided below, organized by reporting calendar year.
The 2023 operator submissions data is provisional and subject to revision and validation by division staff. Available data was provided by operators and may be resubmitted by operators at any time. For the most recent data or if a reporting error is observed, contact the division at cdphe_apcd_ei@state.co.us.
The 2022 operator submissions data is provisional and subject to revision and validation by division staff. Available data was provided by operators and is under review.
- 2022 data validation table / data dictionary
- 2022 pre-production operations
- 2022 production operations
- 2022 midstream and pipeline operations
- 2022 Underground Injection (UIC) operations