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
2025-12-29T19:001570
2025-12-29T20:001960
2025-12-29T21:002551
2025-12-29T22:002566
2025-12-29T23:0027811
2025-12-30T00:00211419
2025-12-30T01:00161932
2025-12-30T02:00142256
2025-12-30T03:00171957
2025-12-30T04:0081857
2025-12-30T05:0051556
2025-12-30T06:0041559
2025-12-30T07:0051358
2025-12-30T08:0061054
2025-12-30T09:007837
2025-12-30T10:007624
2025-12-30T11:009614
2025-12-30T12:001064
2025-12-30T13:001052
2025-12-30T14:00967
2025-12-30T15:0010109
2025-12-30T16:0091518
2025-12-30T17:00111642
2025-12-30T18:00191138
2025-12-30T19:00171219
2025-12-30T20:00171312
2025-12-30T21:00211112
2025-12-30T22:00241614
2025-12-30T23:00211715
2025-12-31T00:00182216
2025-12-31T01:00192316
2025-12-31T02:00192022
2025-12-31T03:00172336
2025-12-31T04:00152346
2025-12-31T05:00131848
2025-12-31T06:00111641
2025-12-31T07:00111434
2025-12-31T08:00111033
2025-12-31T09:008731
2025-12-31T10:008626
2025-12-31T11:006518
2025-12-31T12:007420
2025-12-31T13:009518
2025-12-31T14:007612
2025-12-31T15:008611
2025-12-31T16:006717
2025-12-31T17:008822
2025-12-31T18:0012719
2025-12-31T19:00719

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