Air Quality Advisory

Air Quality Advisory through Friday, November 16, due to heavy wildfire smoke impacts in parts of the Bay Area from the Camp Fire in Butte County. See our Wildfire Safety Tips web page.

Air Monitoring Data

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This page provides access to current and historical air quality and meteorological information based on measurements taken at stations in the Air District’s air monitoring network. Some of the data on these pages is raw or unchecked data that may contain errors.

Measurement: PM2.5

PM2.5 is a term for fine particulate matter pollution.  PM2.5 is primarily a problem in the wintertime in the Bay Area, when wood burning constitutes the major source.

Daily AQI Measurements

Each cell in this chart shows the estimated hourly Air Quality Index (AQI) values for PM2.5.  

As established by the U.S. EPA, the AQI for PM2.5 is based on 24-hour concentrations, so hourly readings are only estimates.  

The column at far right shows the preliminary AQI value for the day, based on the 24-hour average concentration.

If the number in the far right column is greater than 100, it means that PM2.5 levels were over the federal health standard.  Values between 101 and 150 in the far right column mean that air quality was in the Unhealthy for Sensitive Groups category for the day.  If the value in the far right column is greater than 150, that means air quality was in the Unhealthy category.

* At this time, PM2.5 measurements at the Napa Valley College location are for informational purposes only.

AQI Key 
Coast & Central Bay
Stations Thursday, November 15, 2018
Hourly PST 01234567891011121314151617181920212223
Berkeley Aquatic Park
190
Laney College
193
Oakland East
192
Oakland West
195
San Pablo - Rumrill
183
Eastern Zone
Stations Thursday, November 15, 2018
Hourly PST 01234567891011121314151617181920212223
Livermore - Rincon Ave.
196
Pleasanton - Owens Ct
191
Wood Burning Status
Wood Burning Status
  • illegal to burn

    Thursday,
    11/15

    Winter Spare the Air Alert in Effect

  • illegal to burn

    Friday,
    11/16

    Winter Spare the Air Alert in Effect