A district court dismissed a homebuilder association's lawsuit against EPA and the U.S. Army Corps of Engineers challenging their determination that portions of the Santa Cruz River are traditional navigable waters (TNW) under the CWA.

A California court held that the California Department of Public Health must adopt a final primary drinking water standard for hexavalent chromium.

The Ninth Circuit affirmed a lower court decision vacating the Nevada state engineer's approval of the state wildlife agency's application to transfer water rights from agricultural land in the Newlands Reclamation Project to the Carson Lake and Pasture, a wetlands-containing wildlife r

A district court dismissed a landowner's lawsuit challenging the U.S. Army Corps of Engineers' jurisdictional determination for property that contains peat.

The Ninth Circuit, on remand from the U.S. Supreme Court, held that pollution exceedances detected at monitoring stations in Los Angeles County were sufficient to establish the county's liability for NPDES permit violations under the CWA. In Los Angeles County Flood Control Dist. v.

The Supreme Court of Nebraska held that a 2010 state law that changed the manner in which wind energy generation facilities in Nebraska are taxed is constitutional.

The Ninth Circuit held that BLM's resource management plan (RMP) for the Upper Missouri River Breaks National Monument complied with NEPA and the Federal Land Policy and Management Act (FLPMA) but violated the National Historic Preservation Act (NHPA).

The Ninth Circuit, in an unpublished opinion, affirmed in part and reversed in part a lower court decision denying an environmental group's motion to preliminarily enjoin a BLM-approved timber sale.

A district court upheld DOI's approval of oil spill response plans an oil company submitted for drilling operations in the Chukchi and Beaufort Seas.

The Ninth Circuit affirmed in part and reversed in part a lower court decision granting summary judgment in favor of homeowners and the Nevada Division of Environmental Protection in a CERCLA and RCRA case involving soil and groundwater contamination under a Las Vegas shopping center.