With the river possibly in its driest period in 1,200 years and facing an uncertain climate and hydrological future, the U.S. Bureau of Reclamation wants public comments on what issues should be covered for its reservoirs.
Fire has burned nearly 19,000 acres on the Tohono O'odham Reservation.
Federal officials declared the Arizona eryngo, a rare wildflower, an endangered species and designated nearly 13 acres in Pima and Cochise counties as critical habitat.
For subscribers: Although sometimes confused for native javelina, feral hogs were brought to North America centuries ago by Spanish missionaries as a source of food. Some escaped.
For Star subscribers: Rep. Raúl Grijalva, House Natural Resources Committee chair, wants feds to consider halting mining company's grading for the Copper World project as a Clean Water Act violation. But the company says there's no federal determination any washes on site are worthy of U.S. …
Surveyors combed canyons and the upper reaches of Tucson's Saguaro National Park to find rare plants, some thought to be extinct locally, and new plant species.
A federal judge dismissed a bid by three tribes to stop the ongoing work of Hudbay Minerals Inc. in the Santa Rita Mountains south of Tucson.
For Star subscribers: A House committee chaired by Rep. Raúl Grijalva Wednesday morning asked for the Justice Department to investigate “potentially criminal conduct” by the Trump administration over the Villages at Vigneto project.
For Star subscribers: In a briefing, federal water officials made it clear they expect more severe shortages for the CAP water than occurred this year, and that cities across Arizona should be making plans to use less water.
For Star subscribers: Officials say they hope to find ways to close gap as part of renegotiations of state and federal guidelines for operating reservoirs.
For Star subscribers: Hudbay is working to build waste rock and tailings disposal facilities in the the Santa Rita Mountains for its Copper World Mine.
For Star subscribers: A wind farm proposed in the high desert about 30 miles north of Tucson, has drawn swift opposition from Southern Arizona ranchers.
For Star subcribers: A federal biological opinion concerning the impact Fort Huachuca has on endangered species along the San Pedro miscalculated the amount of groundwater the fort will save in its conservation efforts.
This is what you should find if you go out Christmas shopping today.
Former U.S. Congressman Jim Kolbe died on Dec. 3, 2022, at age 80.
ZooLights now lighting up the night through December 23, 6-9 p.m. at Reid Park Zoo, Tucson, Ariz.
Brittney Griner has been freed from a Russia prison in a high-level prisoner exchange. Here's a look at the WNBA All-Star and two-time Olympic gold medalist's career on and off the basketball court.
Authorities say the leader of a small polygamous group near the Arizona-Utah border had taken at least 20 wives and punished followers who didn't treat him as a prophet. An FBI affidavit released last Friday alleges that Samuel Bateman orchestrated sexual acts with followers and traded wives. It was filed in a case that charges three of his female followers with kidnapping children from state custody in Arizona and impeding a foreseeable prosecution. Two of the women appeared in federal court in Flagstaff on Wednesday and were ordered held. Bateman is facing state and federal charges of child abuse and tampering with evidence.
Many decisions by New Mexico’s most powerful regulatory panel have had direct economic and environmental consequences for one corner of the state, and yet not one candidate nominated to fill the Public Regulation Commission is from northwestern New Mexico. Critics are concerned about the lack of representation as Gov. Michelle Lujan Grisham prepares to pick a new commission as part of an overhaul that takes New Mexico voters out of the equation. Former two-term governor and U.S. diplomat Bill Richardson is among those taking notice. He called it “a glaring omission," saying residents in the area — particularly Navajos — need to have a voice in future regulatory decisions.
Federal and University of Arizona researchers added red dye to the Santa Cruz River on Tuesday morning as part of a study looking into sunlight's effect on chemicals and other materials in the water. The non-toxic dye was put in the river near West Ina Road and is expected to travel downstre…
For Star subscribers: Researchers will use a nontoxic dye to help show whether sunlight can destroy various chemical compounds in the Tucson river water, including pharmaceuticals and personal care products.
For Star subscribers: Recent spikes in water usage, during record-setting hot and dry periods, were very rare for conservation-minded Tucsonans — we've kept overall water use steady for decades despite population growth. The spikes raise questions about future water demand, and supplies, un…
Saguaro National Park will survey visitors after posting its busiest year on record. The goal is to find out how many visitors are locals and how many are from out of town, as well as what other amenities they'd like to see.
Understanding how how plants talk with each other is the focus of research at the University of Arizona to engineer plants that have a better chance of surviving in a warmer world.
For Star subscribers: Tucson got national praise in 2008 for a law requiring new commercial developments to get at least half their landscaping water from rain, not drinking water. But many developments aren't complying and the city issues no citations.
The 18-year-old from Tucson was shot and killed on Dec. 4 following a confrontation with a trooper west of Arivaca Road.
A man armed with a knife was shot and killed early Wednesday morning at an apartment complex on Tucson's south side.
On Dec. 4, a trooper stopped a large SUV for multiple traffic violations and suspected criminal activity west of Arivaca Road. The driver eventually fled from the traffic stop when the trooper was confronted by a passenger.
For Star subscribers: Action being considered following Star article on issues arising from tow company.
Kelli Ward, head of Arizona's GOP, has asked the state Attorney General's Office to investigate whether Democrat Katie Hobbs' having two posts on Twitter removed is against federal or state law.
The White House Tribal Nations Summit was started in 2009 by then-President Barack Obama. The Trump administration stopped the event in 2017.
In a letter Sunday responding to the state Attorney General's Office, county elections officials reject claims some ballots were mishandled on Election Day.