The U.S. Environmental Protection Agency (USEPA) collects emissions data each year from oil and natural gas operators in the U.S. through the Greenhouse Gas Reporting Program (GHGRP). While studies have indicated that these emissions are underestimated, the data are reported using a consistent methodology across operators, providing an opportunity to better understand operational differences and trends. The largest methane emissions source category for onshore oil and gas production is pneumatic devices, which make up 56% of methane emissions. From 2018 to 2020, reported emissions from pneumatic devices declined 16%. The drivers of this change include fewer high-bleed pneumatic devices in operation and fewer operating hours reported per intermittent bleed pneumatic device.

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