Ozone High Pollution Advisory for Maricopa County, Arizona

The Arizona Department of Environmental Quality (ADEQ) has issued an Ozone High Pollution Advisory (HPA) for Maricopa County for Thursday, July 23, 2026. Ozone levels are expected to exceed the federal health standard. The public is advised to limit outdoor activity, especially children and adults with respiratory problems. Restrictions include prohibiting wood burning and government entities from operating leaf blowers.