Southwestern Energy Co. this week said it would become the nation’s first exploration and production (E&P) company to certify that its natural gas is responsibly produced from all of its wells across an entire basin.

The company reached an agreement for Project Canary to continuously monitor emissions and certify responsibly sourced gas (RSG) from all wells across the Appalachian Basin. The company produces 3 Bcf/d across more than 789,000 net acres in Ohio, Pennsylvania and West Virginia, making it the country’s third largest natural gas producer. 

Southwestern’s agreement moves beyond pilot projects to certify RSG and monitor emissions at select well sites that other producers have signed. The Houston-based E&P was an early RSG adopter, certifying its first Appalachian...