Overview
- Utah air-quality officials say Salt Lake County is at unhealthy for sensitive groups, with Davis and Utah counties expected to join the orange category as conditions deteriorate.
- The state has imposed mandatory restrictions that prohibit open burning and solid‑fuel‑burning devices, and residents are urged to reduce idling, consolidate trips, use transit, and work remotely.
- The National Weather Service reports dense haze with expanding nighttime fog and says a Thursday–Friday disturbance may only weaken the inversion aloft, with more substantive clearing likely late next week.
- IQAir rankings placed Salt Lake City at the worst in the United States on consecutive days, though local AQI readings remained in the moderate range and far below levels seen in global hotspots.
- University of Utah researcher Derek Mallia and Trace AQ launched the Flow AQ app, offering localized four‑day air‑quality forecasts across the Western U.S. to help residents plan around pollution.