Annual and Winter UGRB Emissions

Actual emissions inventories and production information is required of both major and minor, oil and gas sources in the Upper Green River Basin (UGRB) in support of efforts to reduce elevated ozone levels in the area.  This information is collected on an annual basis. 

Annual emissions inventories for the previous year will be due no later than April 30th of the current year. 

Winter time emissions inventories (covering operations during February 1st – March 31st) will be due no later than June 30th of the current year.

Facilities with associated American Petroleum Institute (API) number (i.e. production sites, water injection wells, tank batteries, etc.) should be reported using one of three excel “Production Equipment Inventory” forms available below.  These forms are identical in nature except that they allow the user to report more or less facilities.

All other facilities (i.e. compressor stations, gas processing facilities, water injection facilities, etc.) should be reported using one of two “Compressor Station and Pipeline Emissions Inventory” forms available below.  These forms are identical in nature except that they allow the user to report more or less facilities.

The “Emission Factor Groups” Excel file available below can be used to determine which emission factor group oil and gas facilities belong to.  The AQD has developed 55 different field and formation specific emission factor groups.  Emission factors have been generated for roughly 18 of the 55 groups.  Within this Excel file is a pivot table designed to provide a list of wells by operator that are in each emission factor group.  Further instructions can be found on the “Instructions” tab of this Excel file.

Instructional .pdf files for completing and uploading emissions inventory forms can also be downloaded below.  For questions concerning whether a facility is located within the UGRB ozone nonattainment designation area, please contact Brett Davis at 307-777-3366 or brett.davis@wyo.gov and provide a legal description of the location.

Please note that the Excel forms available below must be completed using Microsoft Excel 2007 or a newer version of this software.  Also, please be aware that the files below can exceed 5 MB in size!


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