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Today’s Air Quality & Forecasts

Current Air Quality Conditions

Current air quality values and colors correspond with the Air Quality Index (AQI). More information about the AQI is available at the bottom of this webpage.

The grid below shows current AQI conditions for each pollutant that is measured at each of our monitoring stations. By clicking the “Show” button on each monitoring station box, you can see what the AQI conditions were for the past 24 hours, shown in a rolling format.

HourOZONEPM10PM2.5
2025-09-13T23:0024409
2025-09-14T00:0024317
2025-09-14T01:0025229
2025-09-14T02:00251910
2025-09-14T03:0022198
2025-09-14T04:0020197
2025-09-14T05:0021163
2025-09-14T06:0020162
2025-09-14T07:0019121
2025-09-14T08:0017110
2025-09-14T09:0013106
2025-09-14T10:0013103
2025-09-14T11:00890
2025-09-14T12:00990
2025-09-14T13:001090
2025-09-14T14:001270
2025-09-14T15:0013120
2025-09-14T16:0016326
2025-09-14T17:00194117
2025-09-14T18:00215225
2025-09-14T19:00236332
2025-09-14T20:00226132
2025-09-14T21:00236824
2025-09-14T22:00237723
2025-09-14T23:00245831
2025-09-15T00:00245831
2025-09-15T01:0024
2025-09-15T05:0011-999-999
2025-09-15T06:00866
2025-09-15T07:00778
2025-09-15T08:006710
2025-09-15T09:005716
2025-09-15T10:005811
2025-09-15T11:00382
2025-09-15T12:00391
2025-09-15T13:00770
2025-09-15T14:00960
2025-09-15T15:001340
2025-09-15T16:001540
2025-09-15T17:001860
2025-09-15T18:0020138
2025-09-15T19:00232212
2025-09-15T20:0024306
2025-09-15T21:0026353
2025-09-15T22:0028397
2025-09-15T23:00397

Forecasts

Forecasted air quality values and colors correspond with the Air Quality Index (AQI). More information about the AQI is available at the bottom of this webpage.

Historical Data

To check “AQI Summary by Date”, click the link above which will direct you to EPA’s AirNow website. Select the “Archive” header on the new webpage. Then, use the calendar tool at the bottom of the webpage to select the historical date. On the left side of the screen, there are options to focus on specific pollutants using both the “Contours” and “Monitors” layers.

EPA AirNow Fire and Smoke Map

The EPA has launched a sensor data pilot project on the AirNow Fire and Smoke Map that is designed to provide the public with additional information on levels of fine particle pollution in the air, particularly during wildfires. The Fire and Smoke Map displays AQI data from permanent monitors, temporary monitors, and low-cost sensors. The type of monitor is indicated by the shape:

For potential smoke impacts and information from California wildfires, please see the California Smoke Information site.

About AQI Values & Recommendations

See AQI Table below for how to interpret the AQI colors shown in the current air quality grid and forecasts above. The index numbers represent a ranking for the pollutant, not the measurement of a pollutant. To see concentration values, which show the actual measured levels of the pollutant, visit the Station Data webpage. The Index below presents ratings for: ozone; particulate matter smaller than 10 microns in diameter (PM10); and particulate matter smaller than 2.5 microns in diameter (PM2.5).

aqi guide