Arizona Unknown Air Quality Alert | Effective 07/24/2026 13:50
The Pima County Department of Environmental Quality (PDEQ) has
issued an Ozone Action Day for the Tucson Metro area until 8 PM MST
this evening.
This means that forecast weather conditions combined with existing
ozone levels are expected to result in local maximum 8-hour ozone
concentrations that pose a health risk. Adverse health effects
increase as air quality deteriorates.
Ozone is an air pollutant which can cause breathing difficulties for
children, older adults, as well as persons with respiratory