2 Day Forecast

Air Quality Forecast
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.

Ozone Exceedances

Summer 2019

Spare the Air Alerts
National 8-Hour Ozone Excess Days
California 1-Hour Ozone Excess Days
California 8-Hour Ozone Excess Days


Spare the Air in the San Francisco Bay Area

Spare the Air logo

During the warmer weather months and every day throughout the year, Spare the Air by looking for ways to share, shorten, or change your commute. Spend less time alone in your car and more time doing what you want to do. Enjoy the many perks experienced by commuters who take transit, carpool, bike or walk to work instead of driving alone.

Spare the Air Alerts

The Bay Area Air Quality Management District issues Spare the Air Alerts when ozone pollution is forecast to reach unhealthy levels in the Bay Area.

The 2019 Spare the Air smog season runs through October.

To find out when a Spare the Air Alert is in effect, register for email AirAlerts, sign up for text alerts - it’s easy, to sign up, text the word “START” to the number 817-57 - call 1(800) HELP-AIR, download the Spare the Air app or connect with Spare the Air on FacebookTwitter and other social media.  Spare the Air Alerts will also be posted on this website and the www.baaqmd.gov website.

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 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

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.