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 |
- Current AQI
- Today's Forecasts
- Tomorrow's Forecasts
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| Merced, 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.
Fires: Current Conditions |
| Click to see map |
| Wildfire Guide and Factsheets |
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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
October 10, 2019: AirNow may experience times when it is unable to update maps and data as PG&E restores power in California. Please check your state or local air agency website for the latest information on air quality at your location. A list of state and local agencies is available here. We apologize for the inconvenience.
