CNX’s overall GHG emissions reduction strategy provides a co-benefit reduction of non-GHG emissions, including volatile organic compounds (VOC), nitrogen oxides, particulate matter, and sulfur oxides. We have adopted control technologies that specifically limit these emissions and the ground-level ozone attributed to them. The sources of the emissions where these technologies are applied include natural gas-driven continuous bleed pneumatic controllers, natural gas-driven diaphragm pumps, reciprocating compressors, centrifugal compressors, fugitive emissions components, and storage vessels installed at unconventional well sites and gathering and boosting stations. In most situations, the techniques employed are more stringent than those recommended by the U.S. EPA to attain and maintain the ground-level ozone National Ambient Air Quality Standards (NAAQS).  

As part of our Radical Transparency program CNX has initiated air quality monitoring—including certain VOCs and particulate matter—around our facilities to provide relatable data to communities and regulatory agencies, helping them understand the true impacts of natural gas development and production. Disclosing key environmental data helps build trust in the communities where we operate.

Air emission (Metric tons) 2021 2022 2023
Nitrogen oxides (NOx) 677 590 550
Sulfur oxides (SOx) 4 3 3
Volatile organic compounds (VOCs) 1,076 988 744
Hazardous air pollutants (HAPs) 105 108 100
Particulate matter (PM) 37 36 39
Carbon monoxide (CO) 268 250 240
Formaldehyde 17 23 21

Note: Particulate matter (PM) emissions increased in 2023 due primarily to the installation of new rich-bum compressor engines in the Gathering & Boosting segment.