2 Day Forecast

Air Quality Forecast
Tuesday, October 6 at 10:26 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.

Ozone Exceedances

Summer 2015

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


There's a better way to work! Look for ways to share, shorten, or change your commute - so you spend less time alone in your car and more time doing what you want to do. Be "in the know" by carpooling with coworkers. Take transit where you can finally finish that novel or clean out your inbox. Ride your bike to work and let your commute be your new gym.

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:

• Call 1-800-HELP AIR (1-800-435-7247)
• Sign up to receive email AirAlerts
• Download the Spare the Air App for iPhone or Android
• Download the Spare the Air widget to your website
• Connect with Spare the Air on Facebook, Twitter, or Google+ 

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.


Wildfire Smoke Advisory

A shift in wind patterns on Thursday may cause smoke from the Valley Fire to impact parts of the North Bay - and especially Napa County - through the weekend.  For wildfire smoke safety tips, view this CDC web page.

Great Race for Clean Air

Great Race Logo

Join the Great Race for Clean Air!

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.

2014 Annual Report

The Bay Area Air District's Annual Report is available online.


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.

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.

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.

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 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.