A district court denied a motion for preliminary injunction in a lawsuit concerning irrigation of a golf course in Big Sky, Montana. Environmental groups argued a Montana water district over-…

The U.S. Supreme Court denied certiorari in a lawsuit concerning President Barack Obama's 2016 proclamation of the Northeast Canyons and Seamounts National Marine Monument off the New England…

The D.C. Circuit affirmed dismissal of a lawsuit concerning reserved water rights in the Klamath River Basin. Ranchers sued to prevent Native American tribes from exercising reserved water rights…

A state court reversed the Maryland Department of the Environment's (MDE's) decision to reissue an NPDES general permit for animal feeding operations without limitations on the discharge…

The Fourth Circuit granted a pipeline company's petition to review the North Carolina Department of Environmental Quality's (NCDEQ's) denial of a CWA §401 certification for…

The Tenth Circuit reversed and vacated a district court order preliminarily enjoining EPA and the Army Corps of Engineers from implementing the 2020 Navigable Waters Protection Rule (NWPR) in…

The Ninth Circuit reversed a district court order staying state law claims in a lawsuit concerning the California Water Resources Board's amendments to its water quality control plan for the…

The Montana Supreme Court reversed, 5-2, a lower court decision reversing the Montana Department of Natural Resources and Conservation's (DNRC's) issuance of a beneficial water use…

The Ninth Circuit affirmed in part and vacated in part a district court's dismissal of a county's complaint in long-standing litigation over appropriation of water in the Walker River…

The U.S. Supreme Court denied, 8-0, Texas' motion to review a river master's final determination in a long-running dispute over how Texas and New Mexico share water. Texas challenged the…