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 San…

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 permit for a…

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 Basin. The…

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 river…

The Tenth Circuit held, 2-1, that a sovereign must affirmatively act to extinguish aboriginal water rights in a lawsuit concerning water rights of the Pueblos of Jemez, Santa Ana, and Zia in the…

The Illinois Supreme Court dismissed a lawsuit concerning the city of Chicago's replacement of water meters and water main pipes as well as the partial replacement of lead service lines that run…

The Nevada Supreme Court held that the public trust doctrine did not permit reallocation of water rights already adjudicated and settled under the doctrine of prior appropriation in a lawsuit…

The Washington Supreme Court upheld the Department of Ecology's rule that set a summertime minimum instream-flow rate for the Spokane River at 850 cubic feet per second (cfs). Environmental groups…

A district court denied summary judgment for New York in a challenge to EPA's designation of the eastern Long Island Sound as an open-water dredge disposal site. New York argued EPA's…

A district court dismissed a lawsuit challenging two protocol agreements entered into by Native American tribes and the Bureau of Indian Affairs that established procedures for enforcement of the…