U.S. Air Quality Outlook July 28, 2026: Cleaner Air for Many States
U.S. air quality improves across many states while wildfire smoke and pollution continue impacting others. See the latest nationwide outlook for July 28, 2026.
Ozone Pollution
Air Quality Alert Colorado: Ozone Action Day for Denver Metro | July 27, 2026
Air Quality Alert issued for Denver, Boulder, Douglas, Jefferson, Larimer, Weld and surrounding Colorado counties as elevated ozone levels are expected July 27, 2026.
Air Quality Alert: Ozone High Pollution Advisory Issued for Phoenix Metro and Maricopa County
The Arizona Department of Environmental Quality has issued an Ozone High Pollution Advisory for Maricopa County and the Phoenix Metro area. Learn who is at…
