Using GHG Inventory and GHGRP Data

EPA tracks U.S. greenhouse gas emissions and their sources through two complementary programs: the Inventory of U.S. Greenhouse Gas Emissions and Sinks (the Inventory), and the Greenhouse Gas Reporting Program (GHGRP).

While the two programs cover emissions from many of the same sources, they are not identical in their coverage, categorization, or methodologies. The table below highlights some of the key distinctions between the Inventory and the GHGRP.

Inventory GHGRP
Where do the data come from? Calculated by EPA Reported by over 8,000 facilities
Which emissions sources are covered? All sources and forestry sinks Large emitters
(>25,000 MTCO2e/Year)
What percentage of total U.S. emissions is reflected in the data? 100% 85-90%
How are the program’s data parsed? National, by sector National, state, local, sector, facility-specific
When did data collection begin? 1990 2010

Learn more about the differences and similarities between the Inventory and the GHGRP.

You can use FLIGHT and Data Explorer in tandem to research the answers to your GHG questions. Want to see which sector has contributed the most GHG emissions nationally since 1990? Find out by looking at the long-term trends in Data Explorer, then go to FLIGHT to find the facilities contributing the most GHG emissions in your state or metro area.

Button to visit GHGEI Data Explorer Button to visit GHGRP Flight

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