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Air quality

Learn how to keep yourself safe from harmful smoke and poor air quality.

Our air quality is always changing. It’s affected by local vehicle emissions and wildfires in different parts of the state. Smoke from wildfires and structure fires can affect health, causing eye and throat irritation, coughing, and difficulty breathing. These changes can happen quickly. Be prepared to protect yourself and your home in the event of an air quality alert.

Check the air quality

The Bay Area Air Quality Management District protects and improves community health through air quality improvement. Visit their site to learn more about what you can do to prepare for poor air quality and see current air quality data.

You can get hyper-local, real-time air quality data from AirNow's Fire and Smoke Map. When you look at the Fire and Smoke Map, you'll see air quality ratings that range from green to maroon. Here's how to understand the air quality ratings you'll see on the map: 

Daily AQI Color Levels of Concern Values of Index Description of Air Quality
Green Good 0 to 50 Air quality is satisfactory, and air pollution poses little or no risk.
Yellow Moderate 51 to 100 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Orange Unhealthy for Sensitive Groups 101 to 150 Members of sensitive groups may experience health effects. The general public is less likely to be affected.
Red Unhealthy 151 to 200 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.
Purple Very Unhealthy 201 to 300 Health alert: The risk of health effects is increased for everyone.
Maroon Hazardous 301 and higher Health warning of emergency conditions: everyone is more likely to be affected.

Stay safe inside

When there is poor or unsafe air quality outside, you can stay safe inside by: 

  • Staying indoors as much as possible. Keep your children and pets inside, too.
  • Keep doors and windows closed.
  • If you have one, use an air purifier.
  • Turn off fans or anything else that brings outside air into your house. Set your air conditioner so it reuses the air that's already inside.
  • Don't burn candles or oil lamps inside.
  • Minimize your use of stoves or fireplaces that run on propane or gas. If you need to use a gas stove, turn on your exhaust fan.

Stay safe outside

If you need to go outside when there's poor air quality, you can stay safe by:

  • Wearing a mask that will protect you from small particles, like an N95 mask. A cloth or surgical mask won't block small particles.
  • If you work outside, take plenty of breaks.
  • In the event of an emergency or if someone has difficulty breathing, call 9-1-1.

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Page updated August 6, 2026