The Fifth Circuit granted EPA's motion to vacate its disapprovals of portions of regional haze SIPs submitted by Texas and Oklahoma and the issuance of federal implementation plans (FIPs) establishing a long-term strategy and/or reasonable progress goals for the states. EPA argued that because key d...

A district court granted EPA's motion to dismiss a TSCA citizen suit brought by environmental groups concerning fluorination. The groups sought to compel EPA to prohibit the company's fluorination practices, which produced per- and polyfluoroalkyl substances (PFAS), a class of carcinogenic chemicals...

The Sixth Circuit vacated EPA's 2023 disapproval of a SIP proposed by Kentucky to comply with Agency changes to ozone NAAQS. Kentucky challenged the disapproval, which rested on different modeling that came out after the Agency's deadline for submitting the plan and on a lower threshold than the one...

In a per curiam opinion, a divided en banc Fifth Circuit affirmed a district court's civil penalty award of $14.25 million against an oil company in a long-running dispute concerning alleged CAA permit violations at an industrial complex in Baytown, Texas. Environmental groups had filed a CAA citize...

In an unpublished opinion, the Sixth Circuit affirmed a district court's order remanding to state court a lawsuit concerning a Michigan airport's use of aqueous film-forming foam (AFFF). Michigan's attorney general (AG) and Department of Environment, Great Lakes, and Energy sued in state court, argu...