2 Day Forecast

Air Quality Forecast
Friday, November 27, 2015 10:30 AM
North Counties
Coast and Central Bay
Eastern District
South Central Bay
Santa Clara Valley

Read an explanation of the color-coded AQI scale categories used in the air quality forecast.

View the extended Five-Day Air Quality Forecast.

Find out which reporting zone your city is located in.

View historical ozone data box scores.

PM Exceedances

Winter 2015-2016

Winter Spare the Air Alerts
National 24-Hour PM2.5 Excess Days
California 24-Hour PM10 Excess Days
National 24-Hour PM10 Excess Days


Spare the Air in the San Francisco Bay Area

The 2015/2016 Winter Spare the Air season runs from November 1 through February 29. 

Each day by early afternoon, the Air District will issue an air quality forecast for the next day. If air quality is forecast to be unhealthy, a Winter Spare the Air Alert will be called. The alert will be in effect the entire next day, for a full 24 hours.

When a Winter Spare the Air Alert is in effect, it is illegal to burn wood, manufactured fire logs, pellets, or any other solid fuels in your fireplace, woodstove or outdoor fire pit.

During the winter season, wood smoke is the largest source of harmful particulate pollution. On this website, residents can find information about the health effects of wood smoke, as well as detailed information about the Wood Burning Rule and how to comply with it. Here are answers to some Frequently Asked Questions about the Winter Spare the Air program.

You can also file a wood smoke complaint online

It’s Your Air. Protect It.

To find out if a Winter Spare the Air Alert is in effect, residents and business owners can do the following:

Spare the Air Every Day 

Help reduce pollution and prevent Spare the Air Alerts! Here are some great ways to Spare the Air and find a better way to work:

Commute Tips

Visit stacommutetips.org to get all the information you’re looking for about commute programs and incentives available where you live and work.

Walk or Ride Your Bike

Save money and improve your health, too! Use the Spare the Air app’s Bike Route Planner or the 511 Bike Mapper to plan your trip.

Take the Bus, Ferry or Train

Save gas and money – and reduce stress! Find the fastest route on 511 Trip Planner.


Commute with colleagues or neighbors instead of driving alone. Find your rideshare match at 511.org.

Skip a Trip or Link Your Errands

By combining or eliminating trips, you reduce pollution in addition to saving gas and time.


YES Conference

The Spare the Air Youth for the Environment and Sustainability Conference will be held in Berkeley on Saturday, January 30. Co-sponsored by the Air District and MTC, the YES Conference provides a chance for teenagers who are passionate about slowing climate change to share ideas and practical tips. Registration is totally free but space is limited, so act fast! The first 200 students who register will be entered into a drawing to win a pair of tickets to the NFL Experience in downtown San Francisco!

Great Race for Clean Air

Great Race Logo

Join the Great Race for Clean Air!

San Geronimo Valley Wood Stove Replacement Program

Up to $1,500 is available.  The County of Marin web page has more information on this program.

Bay Area Commuter Benefits Program


The Bay Area Commuter Benefits Program launched on April 1. Bay Area employers with 50 or more employees are now required to register and offer commuter benefits to their employees in order to comply.  See informational video.

Bay Area Bike Share


The Bay Area Bike Share program is up and running. Members have access to 700 bikes in five Bay Area cities.

Bay Area PEV Ready Website

The Air District's Bay Area Plug-In Electric Vehicle Ready website provides info about PEV and charger resources and grants.

Clean Air Legacy

This video, created by the California Air Pollution Control Officers' Association, reviews the impressive work being done by California’s air districts to protect our air quality.

Podcasts and Videos

Listen to Air District podcasts or watch videos about air quality related topics.

Clean Vehicle Guides

Our Clean Vehicle Guides page has links to cleaner-technology car resources.

Spare the Air Apps

Download our iPhone and Android apps and get Spare the Air Alerts and air quality forecasts.