AQI: Good (0 - 50)Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Moderate (51 - 100)Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
AQI: Unhealthy for Sensitive Groups (101 - 150) Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
AQI: Unhealthy (151 - 200) Everyone may begin to experience health effects members of sensitive groups may experience more serious health effects.
AQI: Very Unhealthy (201 - 300)Health alert: everyone may experience more serious health effects.
AQI: Hazardous (301 - 500)Health warnings of emergency conditions. The entire population is more likely to be affected.
Action Day
| Highest 5: |
| About the Highest 5 |
- Today's Forecasts
- Tomorrow's Forecasts
- Current AQI
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| Santa Clarita Vly, CA |
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Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.
Fires: Current Conditions |
| Click to see map |
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U.S. Embassies and Consulates Data from air quality monitors at select U.S. embassies and consulates around the world |
Announcements
Fire air quality information:
Looking for information about air quality near wildfires? AirNow gives you two ways to find out. The “Current AQI” map now appears first when you visit www.airnow.gov. Click on your state for more information. For more detailed information on air quality and fires, visit Fires: Current Conditions,” which includes information from AirNow monitors, temporary monitors near wildfires, and satellites.
