The Bureau of Reclamation's plan may spark a broader effort to make it as economical to leave effluent in rivers as to take it out.
The seventh Southwestern jaguar documented since 1996 doesn't quell the dispute over their significance.
Leaders of the Tohono O'odham Nation southwest of Tucson say they're confident a border wall won't become a reality on their land.
The 1.8-mile crack south of Eloy is among 170 miles of fissures across the state triggered by over-pumping.
Federal officials say the lesser long-nosed bat has recovered well enough to remove it from the endangered species list.
Local environmental quality officials were on "pins and needles" when the Trump administration slapped a freeze on EPA grants earlier this week.
Tax breaks and economic benefits. Conflicts of interest. A Science Commission and a Citizens Committee. Neonicotinoids and BT toxins. Honeybee…
Global biotech giant Monsanto Co. has been taking a verbal pounding in public meetings on its plan to grow corn in an Avra Valley greenhouse o…
Jurisdictional issues "will be a key element" of an appeal if the Corps denies its Clean Water Act permit, says the company proposing the Rose…
Land purchases to offset impacts are inadequate, said a lower-level Corps office in findings obtained through the Freedom of Information Act.
MINEVILLE, N.Y. — Some look at an abandoned, centuries-old iron mine in New York’s Adirondacks and see a relic.
But Arizona water officials say they’ve reached general agreement with water users here for a shorter-term fix.
It's another sign of river recovery since the 2009 upgrade of a Nogales sewage treatment plant.
It's the first confirmed jaguar sighting ever at Fort Huachuca.
Environmentalists say the wildlife service's letter is a victory for threatened wildlife in the San Pedro Valley.
DURHAM, N.H. — For the past 25 years, researcher Stephen Jones has tried to understand the threat that bacteria may pose to oysters in New Ham…
Clean energy and environmental interests usually go hand in hand. But in western New York, they are battling over plans to build dozens of win…
Local food activists say company's record clashes with Tucson's values, but county's administrator sees no major environmental impacts.
The Colorado River will be OK if we just learn to collaborate to fix its problems, says author John Fleck.
Tucson Water wants to put treated wastewater into the dry riverbank within two years.
The Critical Zone Observatory monitors life at the upper reaches of the Santa Catalina Mountains
But Phoenix will store a good deal of its Colorado River supply down here, in exchange for having access to some of Tucson's supply during shortages.