The Navajo Nation and Gila River Indian Community were named alongside more than 100 inaugural members participating in “The America the Beautiful Freshwater Challenge,” an initiative that is intended to restore the country’s waterways.

The nonprofit group American Rivers has released its annual list of the country’s 10 most endangered rivers, and Arizona’s Santa Cruz River ranks fourth.

A federal judge has rejected a request by Native American tribes and environmentalists to stop work on a $10 billion electricity transmission line slated to run through a remote valley in southern Arizona.

According to a recently published study by researchers from Northern Arizona University, the Colorado River loses more than 19 million acre-feet of water to cities, farms and evaporation every year. That’s roughly the same amount of water used by the 50 largest cities in the country.

Drive around the Phoenix area — or just about anywhere in the state right now — and you’ll see tiny, yellow, globe-like flowers popping up just about anywhere. While, they might look like pretty wildflowers, they are not. They are stinknet.

Scientists have studied declines in the monarch butterfly population in the United States and Mexico for years. A new study suggests it’s even more of a mystery than researchers thought.

Stakeholders across the Southwest are working to figure out how to use less water on the Colorado River as it continues to shrink. Now, a new study is shedding light on just where much of that shrinking water supply is going: hay.

The Show's new reporter/host Sam Dingman started his time in Arizona with a visit to Phoenix Herpetological Sanctuary — where he got to experience firsthand the things he read about with anxiety back in Brooklyn.

Monument officials announced Wednesday that the picnic area will be closed from March 28 through April 30 due to the density of an invasive and noxious winter weed called stinknet that can grow more than 2 feet tall.