A district court preliminarily enjoined EPA's and the U.S. Army Corps of Engineers' controversial "waters of the United States" rule. Thirteen states—Alaska, Arizona, Arkansas…

A district court held that it lacked jurisdiction over a coal company's lawsuit challenging EPA's and the U.S. Army Corps of Engineers' controversial "waters of the United…

The Ninth Circuit held that the U.S. Bureau of Reclamation did not violate the CWA by discharging pollutants into the Klamath River without a permit in connection with its management of an…

A district court held that a mining company violated state and federal permits when it discharged high levels of ionic pollution. Environmental groups successfully demonstrated that high…

The D.C. Circuit denied an environmental group's petition for review challenging FERC's decision to issue a natural gas pipeline operator a certificate of public convenience and…

The Third Circuit upheld EPA's TMDL plan for the Chesapeake Bay against challenges from farmer and home building groups. The TMDL—the largest ever developed by EPA—identifies necessary…

The Ninth Circuit granted in part and denied in part a petition challenging an NPDES permit authorizing oil and gas exploration facilities' discharge of 13 waste streams into the Beaufort Sea…

A district court dismissed environmental groups' CWA citizen suit against EPA for failing to respond in writing to their administrative petition seeking withdrawal of West Virginia's…

The Ninth Circuit upheld the Bureau of Safety and Environmental Enforcement's (BSEE's) approval of oil spill response plans for an oil company's leases in the Beaufort and Chukchi…

The D.C. Circuit held that energy companies lack standing to challenge EPA's determination that carbon dioxide (CO2) streams injected into Class VI wells for the purpose of geologic…