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Climate Change

Natural Gas and Petroleum Systems

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It is EPA's standard process to update the Inventory of US. Greenhouse Gas Emissions and Sinks (GHG Inventory) when relevant new and improved data are available. In recent years, as improved data have become available, EPA has updated methods and data sources for calculating greenhouse gas emissions for several key sources in the natural gas and petroleum sectors. See below for materials regarding EPA estimates of greenhouse gas emissions from natural gas and petroleum systems.

Additional Information on Oil and Gas Estimates in the 1990-2014 GHG Inventory (published April 15, 2016)

Archives: Previously posted Memos and other Information on Stakeholder Engagement

Memos previously posted in the development of the 1990-2014 GHG Inventory (published April 15, 2016):

The memos below were posted and open for stakeholder feedback from December 2015-February 2016. Many of the updates discussed in the memos below were implemented in the 2016 Inventory.

Memos presented in the development of the 1990-2013 Inventory (published 2015):

Stakeholder Workshop on EPA GHG Data on Petroleum and Natural Gas Systems

On November 19, 2015, EPA held a stakeholder workshop on GHG data on petroleum and natural gas systems from the Greenhouse Gas Reporting Program and the U.S. Greenhouse Gas Inventory of Emissions and Sinks. View speaker presentations and learn more about the workshop.

Previous Updates to the GHG Inventory:

Additional Information:


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