Tens of thousands of signatures were turned in to the Pinal County elections department petitioning to turn San Tan Valley into a city.

The San Tan Valley incorporation committee is one step closer to asking voters if they want to become a town. Here's what we ...

A new report from the American Lung Association shows that Phoenix's ozone problem is worsening, while its particulate ...

MARICOPA, Ariz. - A road-rage shooting backed up traffic along State Route 347 south of the Valley on Wednesday morning. The ...

Several U.S. cities are experiencing heightened air pollution levels on Wednesday, including parts of Chicago.

Centro will sit on 10 acres in Nogales. It’s a remote operating center for South32 Hermosa, a zinc and manganese mine in the Patagonia Mountains. Some will be watching for its environmental impact as ...