The EPA altered requirements that energy companies repair methane leaks from oil and gas facilities, including lifting a mandate that companies fix leaking equipment during unscheduled or emergency shutdowns.

The Environmental Protection Agency’s final rule (RIN:2060-AT59) addresses two requirements for unintended emissions, known as “fugitive emissions,” in a 2016 rule governing new oil and gas wells.

The first change removes a requirement that oil and gas operators repair sources of fugitive emissions during unscheduled or emergency shutdowns, an...