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.
May 17, 2024 update: For midstream and pipeline operations 2023 ONGAEIR submissions only, the reporting links below have been updated to version 6.1.1. The update is to address a previously broken dropdown on the Stationary Engines or Turbines tab, column BM for reporting the Annual Actual Emissions - CO2eq Estimation Method. If you have already populated the version 6.1 submission form for midstream, email cdphe_apcd_ei@state.co.us before submitting to the web portal, and the ONGAEIR team will guide you through an easy copy and paste solution. Alternatively, download the corrected version 6.1.1 workbook form below.
For 2023 ONGAEIR submissions due June 30, 2024, the revised reporting templates are available under 2023 reporting further down this page. Please use version 6.1 and ensure V6.1 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 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
The 2021 operator submissions data is provisional and subject to revision and validation by division staff. The available data is as reported by operators and is under review.
- 2021 data validation table / data dictionary
- 2021 pre-production operations
- 2021 production operations
- 2021 midstream and pipeline operations