2 Day Forecast

Air Quality Forecast
Friday, April 19 at 9:17 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 PM data box scores.

PM Exceedances

Winter 2018-2019

Winter Spare the Air Alerts
National 24-Hour PM 2.5 Excess Days
National 24-Hour PM 10 Excess Days
California 24-Hour PM 10 Excess Days


Spare the Air in the San Francisco Bay Area

The 2018-19 Winter Spare the Air season ended on February 28. The next Winter Spare the Air season begins on November 1, 2019.

Residents who use their fireplaces, woodstoves, or outdoor fire pits must still burn cleanly using dry, seasoned firewood, and must not burn garbage, leaves or other material that would cause excessive smoke. Residents who exceed the visible smoke provision in the wood-burning rule could still be subject to a ticket, even outside the November-February Winter Spare the Air season.

Wood smoke concerns can be reported by calling 1-877-4NO-BURN (1-877-466-2876).

Spare the Air Alerts

Residents who signed up for Winter Spare the Air phone, text or email alerts will remain on the list to receive calls or emails when the next Winter Spare the Air season begins November 1, 2019.

Residents who signed up for e-mail AirAlerts will also receive e-mails when Spare the Air Alerts are called during the 2019 Summer Spare the Air season. 

Residents who signed up for summer Spare the Air or both summer and Winter Spare the Air text alerts will also receive text alerts when Spare the Air Alerts during the 2019 Summer Spare the Air season.

The iPhone and Android apps will also provide alerts when summer Spare the Air Alerts are called.

It’s Your Air. Protect It.

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

Spare the Air Alerts will also be posted on the Spare the Air and www.baaqmd.gov websites.

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.


Spare the Air Text Alerts

NEW in 2017! Sign up for Spare the Air Text Alerts by texting the word “START” to the number 817-57.

Bay Area Commute Tips

Bay Area Commute Tips is your resource for commute and transportation maps and incentives. Find a way to avoid traffic and reduce your travel time by joining a carpool or vanpool, taking transit, or biking.

Spare the Air, Cool the Climate

The Air District has adopted a bold new plan to Spare the Air & Cool the Climate. Take a quick peek at this video describing the Air District’s vision to address climate change and eliminate health disparities in communities throughout the Bay Area.

Bay Area Commuter Benefits Program


The Bay Area Commuter Benefits Program requires Bay Area employers with 50 or more employees to register and offer commuter benefits to their employees in order to comply.  See informational video.

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 PEV Ready Web Pages

The Air District's Bay Area Plug-In Electric Vehicle Ready web pages provide 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.