Highlights
- ADEQ issued an Ozone High Pollution Advisory for the Phoenix Metro Area covering Monday, May 11, and Tuesday, May 12.
- Forecast ozone concentrations are expected to reach levels that pose health risks, particularly for children, older adults, and people with respiratory conditions.
- Residents are urged to carpool, telecommute, or use mass transit and to avoid gasoline-powered equipment during peak hours.
- The advisory expires Tuesday, May 12 at 9 p.m. and full details are available at azdeq.gov/forecast/phoenix or by calling 602-771-2300.
The Arizona Department of Environmental Quality has issued an Ozone High Pollution Advisory for the Phoenix Metro Area covering Monday and Tuesday, May 11 and 12, according to a National Weather Service alert issued at 9:17 a.m. Monday.
Forecast weather conditions combined with existing ozone levels are expected to produce local maximum 8-hour ozone concentrations that pose a health risk, the alert states. 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. Use of gasoline-powered equipment should be reduced or deferred to late in the day to limit emissions during peak ozone-forming hours.
The advisory expires Tuesday, May 12 at 9 p.m. MST. Additional details are available through ADEQ at azdeq.gov/forecast/phoenix or by calling 602-771-2300.
Around the web
Minimal public engagement; one Reddit post with modest traction unrelated to the advisory.
Public discussion (links to original posts):
- Reddit · r/phoenix, u/clif_hanger (210 upvotes · 13 comments)
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- api.weather.gov retrieved 11/05/2026 16:21
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 11/05/2026 16:21. Every claim traces to a source.
