EPA entered into a proposed consent decree in Sierra Club v. EPA, No. 3:24-cv-00130 (S.D.W. Va.), concerning allegations that the Agency failed to perform a mandatory duty under the CWA to establish TMDLs for certain waters located in the Lower Guyandotte River Watershed in West Virginia that are impaired due to ionic toxicity. 

EPA finalized facility response plan requirements for worst case discharges of CWA hazardous substances for onshore non-transportation-related facilities that could reasonably be expected to cause substantial harm to the environment by discharging a CWA hazardous substance into or on the navigable waters, adjoining shorelines, or exclusive economic zone.