Brandon Loomis

Gila trout, a species threatened by climate change and worsening wildfires, persist in the Southwest with a big assist from volunteers.

Gila trout, a species threatened by climate change and worsening wildfires, persist in the Southwest with a big assist from volunteers.

A deal announced by the International Boundary and Water Commission of the United States and Mexico calls for water use reductions on both sides.

The United States and Mexico have signed a Colorado River treaty amendment under which Mexico will share in the water-use reductions to be imposed

By Arizona will spend $4.9 million to study the prospect of building a seawater desalination plant in Mexico's Gulf of California, the state's Water Infrastructure Finance Authority decided.

A fly fisherman from New Mexico sought solitude and a chance at catching Arizona's state fish last fall when he steered his pickup into a gravel parking strip overlooking a stream that winds through a meadow in the White Mountains.

Coronado National Forest says protesters and others must stay away from border wall construction until Inauguration Day 2029.

Arizona is on the cusp of gaining its fourth national park at what is now Chiricahua National Monument after Congress passed legislation to elevate the Cochise County landmark's status.

Arizona is investing nearly $8.5 million on a study of a seawater desalination project in Mexico, the second such Gulf of California proposal that the state's water augmentation authority has agreed to investigate this year.

CAP officials said the agency joined the lawsuit after the river failed to deliver enough water to meet obligations.