A $5.3 million deal will transfer 9,009 acre-feet of conserved Colorado River water from the Colorado River Indian Tribes for use by an Arizona water agency.

California ordered new dairy rules to reduce nitrate pollution, test drinking water wells and provide replacement water when needed.

New Mexico’s Supreme Court rejected two Project Jupiter challenges, allowing environmental permitting for the massive data center to resume.

Upper Basin states want conserved water credited and stored as Lake Powell enters another year at critically low levels.

Peoria is spending $104 million to secure long-term water supplies as Arizona prepares for smaller Colorado River allocations.

A new study finds U.S. irrigation may prevent far more greenhouse gas emissions by reducing the need to convert natural lands to farms.