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

Ozone pollution was expected to exceed federal health standards, and residents were encouraged to be safe and not contribute to ozone pollution.

PHOENIX (AZFamily) — While Wednesday is not a ‘No Burn Day,’ Maricopa County Air Quality Department officials say there has been a record number this season. There has also been a record ...

and other everyday activities react to sunlight," the Maricopa County Air Quality Department stated. "Because these emissions react more readily to sunlight, ozone pollution is more prevalent ...