Among the 15 counties on our list is Maricopa County, in the southwestern swing state of Arizona. Maricopa County, home to Phoenix, is the politically competitive heart of one of the key ...

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

The Maricopa County Board of Supervisors extended an offer to County Recorder Justin Heap on Thursday, as part of an effort ...

The Maricopa County medical examiner's office identified him as Kevin Vallesteros. The office has not yet determined his cause and manner of death. Honolulu police said he died Tuesday morning.