A flush of cleaned wastewater into the Santa Cruz River has restored a fish and wildlife connection in Arizona's Sky Islands.

TUMACÁCORI, Ariz. — The Santa Cruz River is not like most American rivers. If some of its admirers get their wish, it might also become a wildlife refuge unlike any other. Much of its 184-mile ...

Arizona is a state full of world-famous destinations, but one of its lesser-known treasures is hidden among canyon walls ...

The Arizona Department of Environmental Quality ... The outcome of these talks will determine how the Colorado River's precious resources are allocated in the coming decades, with major ...