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A Border Patrol vehicle drives along a section of fence at the Organ Pipe National Monument, west of Lukeville and south of Ajo, Arizona, Nov. 2, 2018.

Conservation, law enforcement and ranching: Weighing in on a proposed border fence

Jul 25, 2019 The majority of new bollard-style wall would run through protected areas in Pima and Cochise counties.
The proposed site of the Rosemont Copper mining project is in the Santa Rita Mountains in Southern Arizona.

Judge to rule next week on whether to halt Rosemont Mine

Jul 24, 2019 Tribes and environmental groups who oppose the project are seeking a preliminary injunction.
A United States Geological Survey photo of the lower Little Colorado River, July 2013.

Lawsuit challenges northern Arizona fracking leases

Jul 16, 2019 Conservation groups say the BLM violated laws by not conducting environmental reviews or consulting tribes.
The sun rises over the Rincon Mountains in this view from Mt. Bigelow

More deadly temperatures in Arizona's future

Jul 16, 2019 Climate change will bring more extreme heat in the coming decades.
The Port of Guaymas, Mexico.

Sulfuric acid leak in Mexico’s Sea of Cortez a ‘wake-up call’

Jul 12, 2019 A researcher says the impact was minimal, but that it shows the need to consider the potential for a spill on a much larger scale.
The International Outfall Interceptor, or IOI, runs under this concrete-lined wash through the city of Nogales, Ariz.

A new effort to deal with a leaky cross-border sewage pipe

Jul 11, 2019 For years, Nogales residents have suffered from water contamination that stems from the wastewater line.
The sign outside of Sahuarita Town Hall.

Sahuarita residents urged to boil water

Jul 11, 2019 E. coli bacteria were detected in some samples of the drinking water.
Water creeps along the Santa Cruz riverbed on the release day of a project aiming to create a perennial flow in a section of the river near downtown, June 24, 2019.

Santa Cruz River project means coordination between water infrastructure managers

Jul 8, 2019 New water released into the Santa Cruz River means the city and county are working together on issues like flooding and wastewater.
Fishing boats float on the Sea of Cortez outside the little town of San Felipe, Baja California, in October 2018.

UNESCO designates vaquita porpoise habitat as ‘in danger’

Jul 8, 2019 There are estimated to be only 10 remaining vaquita porpoises in the Sea of Cortez.
Lake Powell on the Utah-Arizona border continues to drop as snowpack declines throughout the southwestern U.S. The narrow passageway shown here in September 2018 has been rendered unusable as water levels drop.

Arizona senators propose drought bill

Jul 7, 2019 The bipartisan bill aims to help water utilities plan for dry future
Trucks carrying cargo at the Mariposa Port of Entry on the border of Arizona and Sonora.

EPA: Air quality improves at Nogales port

Jul 2, 2019 The report credits reduced wait times and other factors for the reduction in emissions at the Mariposa Port of Entry.
Water flows north of Cushing Street in the Santa Cruz River, midway through the first week of a project aiming to create a perennial flow in a section of the river, June 27, 2019.

Initial flow for Santa Cruz River project goes beyond expectations

Jul 1, 2019 The project pumping reclaimed water into a section of river near downtown saw water reach farther downriver than predicted.
Gila topminnows wait to be introduced to new habitat in the acequia at Mission Garden.

Native Arizona fish finds new home in Tucson's Mission Garden

Jul 1, 2019 Last week, one of Arizona’s most historically prolific native fish was introduced into some new habitat at the Mission Garden.
Satellite image of California's Camp Fire, Nov. 8, 2018.

Smoke from US wildfires boosting health risk for millions

Jun 26, 2019 Another summer of fires in the West is expected to impact millions and increase premature deaths.
Pima County Supervisor Richard Elias, Tucson Mayor Jonathan Rothschild, Barbara Warren, MD Director of Physicians for Social Responsibility Arizona Chapter, and Professor Ecri Betterton, UA Dept. of Hydrology and Atmospheric Sciences speak at a news conference regarding the dangers of rolling back the federal clean car standards. The event was held in a classroom at the Pima Medical Institute. June 25, 2019

Southern Arizona officials ask Congress to keep clean car standards

Jun 25, 2019 The White House wants to let automakers roll back emission and mileage standards.
"A" Mountain, or Sentinel Peak, stands above the dry riverbed of the Santa Cruz River near Tucson's birthplace. Feb. 22, 2018.

Tucson reviving a stretch of the Santa Cruz River

Jun 24, 2019 Tucson Water is putting water back into the Santa Cruz River near downtown.

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