Oil & gas compliance and recordkeeping

Oil & Gas

Storage tank and vapor control system guidelines

Guidelines for design, operation, and maintenance of vapor control systems at oil and gas facilities.

Oil & gas operating and maintenance plans

Forms and guidance for O&M plans for equipment at oil & gas facilities.

Midstream Steering Committee

Each oil and gas midstream segment owner or operator must participate in this program to reduce GHG emissisons from midstream fuel combustion equipment.  (Reg. 22, Part B, Section III)

Regulation No. 7

Approved Instrument Monitoring Method (AIMM)
Part D, Section I.F.3: Storage Tank Control Strategy 
Part D, Section I.H.6: Glycol dehydrators
Part D, Section II: Alternative Emissions Control Devices
Part D, Section II.C: Storage Tank Emissions Management (STEM)
Part D, Section II.G: Well Liquid Unloading
Part DSection IV: Natural Gas Transmission and Storage Segment
Part DSection V: Oil and Natural Gas Operations Emissions Inventory
  • IMPORTANT NOTE:   Operators should NOT submit 2021 annual Oil and Gas Emission Inventory Reports due 6/30/2022 using the existing GHG Reporting and Oil and Gas Emissions Inventory Submission Form. 
    • Operators, however, can continue to submit 2020 annual Oil and Gas Emission Inventory Reports using that form.
  • A separate new web-based form for submitting Oil and Gas Emission Inventory Reports for 2021 and beyond will be made available by mid-May 2022, along with an FAQ document on the updated submittal process.
  • DO NOT submit any 2021 Annual Oil and Gas Emission Inventory Reports until the new web-based reporting form is up and running.




Midstream and Pipeline: 


Part D, Section VI: Oil and Natural Gas Pre-Production and Early Production Operations
Oil and Natural Gas Emissions Inventory Reporting submission form

The web portal and submission form for submitting annual emissions inventory reports for oil and gas as required under Air Quality Control Commission (AQCC) Regulation No. 7, Part D, Sections IV and V, can be accessed here. The web portal and submission form must be used by entities subject to Colorado's oil and natural gas emissions inventory reporting requirements. A registered user account is required to access the submission form. A PDF of the submission form is available below for review but do not use this to submit a report. The form for reporting can only be accessed through the web portal. Please see the Frequently Asked Questions (FAQ) document below for more detail and answers to others questions on using the form and submitting reports.


Part E, Section I.D.5.b - Large Engines
Part D, Section III.C.4 - Pneumatics Reporting


Leak Detection and Repair (LDAR)


  • PS Memo 14-04 LDAR and open-ended valves and line requirements.
  • March 2021 LDAR Training slides.

LDAR Annual Reports

Visible Emissions Observations


Regulatory Updates Guidance

2020 Revisions to Regulation No. 7

2017 Revisions to Regulation No. 7

2014 Changes to Regulation Nos. 3, 6, and 7

Optical Gas Imaging Infrared (IR) Camera Inspection Program

IR camera inpection pilot project assessment (July 2016)
Two-year project using optical gas imaging infrared cameras to identify and address sources of emission leaks and venting. 

IR camera inspection program updated assessment (March 2019)

Noble Energy consent decree

Settlement between Noble Energy, the Colorado Department of Public Health and Environment and the U.S. Environmental Protection Agency, effective June 2, 2015.

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