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Air Quality Information for the United States

Current Air Quality Alerts for the
United States Issued by the National Weather Service

California

Air Quality Alert
- Issued Jul 7 at 3:58PM PDT by NWS San Diego CA
San Bernardino and Riverside County Valleys-The Inland Empire; San Bernardino County Mountains; Riverside County Mountains; Santa Ana Mountains and Foothills; Coachella Valley; San Gorgonio Pass Near Banning; Orange County Inland
Air Quality Alert
- Issued Jul 7 at 2:31PM PDT by NWS Los Angeles/Oxnard CA
Calabasas and Agoura Hills; Eastern San Fernando Valley; Eastern San Gabriel Mountains; Eastern Santa Monica Mountains Recreational Area; Interstate 5 Corridor; Los Angeles County Beaches; Los Angeles County Inland Coast including Downtown Los Angeles; Los Angeles County San Gabriel Valley; Santa Clarita Valley; Santa Susana Mountains; Western San Fernando Valley; Western San Gabriel Mountains and Highway 14 Corridor; Western Santa Monica Mountains Recreational Area
Colorado

Air Quality Alert
- Issued Jul 8 at 4:10PM MDT by NWS Denver CO
Denver, CO; Boulder, CO; Jefferson, CO; Douglas, CO; Broomfield, CO; Weld, CO; Arapahoe, CO; Larimer, CO; Adams, CO

AIRNow Alerts

  • Location: Auburn, CA
    Alert: Ozone is forecast to reach 101 AQI - Unhealthy for Sensitive Groups on Thu 07/10/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Bakersfield, CA
    Alert: Ozone is forecast to reach 147 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Banning, CA
    Alert: Ozone is forecast to reach 151 AQI - Unhealthy on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy exertion outdoors. Everyone else, especially children, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Brigham City, UT
    Alert: A(n) Health Advisory has been called for Wed 07/09/2025. A(n) Health Advisory has been called for Thu 07/10/2025.
    Health Tip: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 05:22:37 MST
  • Location: C San Bernardino, CA
    Alert: Ozone is forecast to reach 177 AQI - Unhealthy on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy exertion outdoors. Everyone else, especially children, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: C San Bernardino M, CA
    Alert: Ozone is forecast to reach 195 AQI - Unhealthy on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy exertion outdoors. Everyone else, especially children, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Coachella Vly, CA
    Alert: Ozone is forecast to reach 115 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Colfax, CA
    Alert: Ozone is forecast to reach 101 AQI - Unhealthy for Sensitive Groups on Thu 07/10/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Denver-Boulder, CO
    Alert: Ozone is forecast to reach Unhealthy for Sensitive Groups on Wed 07/09/2025. A(n) Action Day has been called for Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 05:22:37 MST
  • Location: E San Bernardino, CA
    Alert: Ozone is forecast to reach 174 AQI - Unhealthy on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy exertion outdoors. Everyone else, especially children, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: E San Fernando Vly, CA
    Alert: Ozone is forecast to reach 101 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: E San Gabriel Vly, CA
    Alert: Ozone is forecast to reach 150 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Fort Collins, CO
    Alert: Ozone is forecast to reach Unhealthy for Sensitive Groups on Wed 07/09/2025. A(n) Action Day has been called for Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 05:22:37 MST
  • Location: Greeley, CO
    Alert: Ozone is forecast to reach Unhealthy for Sensitive Groups on Wed 07/09/2025. A(n) Action Day has been called for Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 05:22:37 MST
  • Location: Hemet and San Jacinto, CA
    Alert: Ozone is forecast to reach 136 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Hesperia, CA
    Alert: Ozone is forecast to reach 105 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Lake Elsinore, CA
    Alert: Ozone is forecast to reach 150 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Lincoln, CA
    Alert: Ozone is forecast to reach 101 AQI - Unhealthy for Sensitive Groups on Thu 07/10/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Metro Riverside CO, CA
    Alert: Ozone is forecast to reach 156 AQI - Unhealthy on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy exertion outdoors. Everyone else, especially children, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Norco and Corona, CA
    Alert: Ozone is forecast to reach 126 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: NW San Bernardino, CA
    Alert: Ozone is forecast to reach 161 AQI - Unhealthy on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy exertion outdoors. Everyone else, especially children, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Ogden, UT
    Alert: A(n) Health Advisory has been called for Wed 07/09/2025. A(n) Health Advisory has been called for Thu 07/10/2025.
    Health Tip: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 05:22:37 MST
  • Location: Perris Vly, CA
    Alert: Ozone is forecast to reach 156 AQI - Unhealthy on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy exertion outdoors. Everyone else, especially children, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Phelan, CA
    Alert: Ozone is forecast to reach 108 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Pomona Walnut Vly, CA
    Alert: Ozone is forecast to reach 150 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Provo, UT
    Alert: A(n) Health Advisory has been called for Wed 07/09/2025. A(n) Health Advisory has been called for Thu 07/10/2025.
    Health Tip: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 05:22:37 MST
  • Location: Roosevelt, UT
    Alert: A(n) has been called for Wed 07/09/2025. A(n) has been called for Thu 07/10/2025.
    Health Tip: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 05:22:37 MST
  • Location: Roseville-Rocklin, CA
    Alert: Ozone is forecast to reach 101 AQI - Unhealthy for Sensitive Groups on Thu 07/10/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Salt Lake City, UT
    Alert: Ozone is forecast to reach Unhealthy for Sensitive Groups on Wed 07/09/2025. Ozone is forecast to reach Unhealthy for Sensitive Groups on Thu 07/10/2025. A(n) Health Advisory has been called for Wed 07/09/2025. A(n) Health Advisory has been called for Thu 07/10/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 05:22:37 MST
  • Location: San Diego Foothills, CA
    Alert: Ozone is forecast to reach 105 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025. Ozone is forecast to reach 108 AQI - Unhealthy for Sensitive Groups on Thu 07/10/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: San Gabriel Mts, CA
    Alert: Ozone is forecast to reach 133 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Santa Clarita Vly, CA
    Alert: Ozone is forecast to reach 151 AQI - Unhealthy on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy exertion outdoors. Everyone else, especially children, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: SW San Bernardino, CA
    Alert: Ozone is forecast to reach 143 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: Tooele, UT
    Alert: A(n) Health Advisory has been called for Wed 07/09/2025. A(n) Health Advisory has been called for Thu 07/10/2025.
    Health Tip: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 05:22:37 MST
  • Location: Vernal, UT
    Alert: A(n) Health Advisory has been called for Wed 07/09/2025. A(n) Health Advisory has been called for Thu 07/10/2025.
    Health Tip: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 05:22:37 MST
  • Location: Visalia, CA
    Alert: Ozone is forecast to reach 122 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: W San Bernardino M, CA
    Alert: Ozone is forecast to reach 164 AQI - Unhealthy on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy exertion outdoors. Everyone else, especially children, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: W San Fernando Vly, CA
    Alert: Ozone is forecast to reach 105 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST
  • Location: W San Gabriel Vly, CA
    Alert: Ozone is forecast to reach 115 AQI - Unhealthy for Sensitive Groups on Wed 07/09/2025.
    Health Tip: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
    Feed Last Updated: Wed, 09 Jul 2025 04:22:37 PST