Colorado River Delta 'Pulse Flow' Shows Signs of Success
Water release at Yuma dam enhances vegetation, opens waterway to Sea of Cortez for first time in half-century.
Parts of Pima County Under Citrus Quarantine
Presence of an insect that can carry disease found in region.
4.7 Earthquake Hit Sedona Sunday Night
Temblor centered 7 miles north of the northern Arizona town and 6 miles underground; no injuries reported.
Female Gray Wolf Wanders in Grand Canyon
Animal was first seen on North Rim earlier this month; wildlife officials confirm species.
More Bighorn Sheep Released North of Tucson
14 sheep scamper uphill to join a dozen surviving from last year's release; more coming Friday.
Bighorn Sheep Release in Santa Catalinas Closed to Public
Arizona Game and Fish spokesman says they don't want crowd control issues, there are 'animal welfare concerns.'
More Bighorn Sheep Coming to Catalina Mountains
Second stage of controversial program to reintroduce animal to Tucson area.
Study Looks into Effects of Wastewater on Santa Cruz River
Sonoran Institute, local officials release initial report on water quality after recent upgrades to treatment facilities.
Orange Sludge Spill from Abandoned Mines Threatening Patagonia Lake
Local environmental officials say Asarco's cleanup efforts not good enough, cite company.
Miles-Long Cell Phone Dead Zone in Oak Creek Canyon Worries Locals
Limited access hampered early efforts for emergency responders to fight Slide Fire; residents, visitors have been complaining for years.
Interior Secretary Reinforces Glen Canyon Dam Preservation
Jewell says during recent visit cooperation of 7 Colorado Basin states key to save source of water, electricity to much of Southwest.
Initial Tests Show No Toxic Waste in San Pedro River
AZ Dept. of Environmental Quality sampled two areas Tuesday after alert that contamination from Mexican mine could potentially make its way north.
Increased Number of Training Flights Coming to Davis-Monthan
More air crews from global allies expected at Tucson Air Force base; noise increase minimal commander says.
Mexican Copper Mine Contamination Spills Into San Pedro River
Authorities in northern Mexico issue a binational alert over mine water leakage in creeks, streams.
Fire Prevention in the Chiricahuas
Chiricahua Mountains assist fire ecology research; they're the largest most biodiverse of Arizona's 'Sky Islands.'
