Highlights

The Arizona Department of Environmental Quality has extended an Ozone High Pollution Advisory for the Phoenix metro area through Friday, July 24, with the alert in effect until 9 p.m. that evening. The National Weather Service in Phoenix issued the advisory at 9:15 a.m. Thursday.

Forecast weather conditions combined with existing ozone levels are expected to produce local maximum 8-hour ozone concentrations that pose a health risk, according to the alert. Adverse health effects increase as air quality deteriorates.

Ozone can cause breathing difficulties for children, older adults, and people with respiratory problems. A decrease in physical activity is recommended for those groups during the advisory period.

Residents are urged to carpool, telecommute, or use mass transit. The use of gasoline-powered equipment should be reduced or shifted to late in the day to limit emissions during peak ozone-formation hours.

Updated forecasts and advisory details are available at azdeq.gov/forecast/phoenix or by calling ADEQ at 602-771-2300. The advisory expires July 24 at 9 p.m.

Sources

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  1. api.weather.gov retrieved 23/07/2026 16:17

Authored by The Scottsdale Signal. Drafted by AI from primary-source material under our beat-specific editorial guides; reviewed by humans before publish under our five-gate process. Sources retrieved at 23/07/2026 16:17. Every claim traces to a source.