To comply with Air Quality Control Commission Regulation 7, Part B, Sections IV and V, 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.
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.
- 2023 pre-production operations
- 2023 production operations
- 2023 midstream and pipeline operations
- 2023 Underground Injection (UIC) operations
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