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
2025-01-18T19:00261221
2025-01-18T20:00291522
2025-01-18T21:00301736
2025-01-18T22:00311737
2025-01-18T23:00311938
2025-01-19T00:00302047
2025-01-19T01:00312152
2025-01-19T02:00312355
2025-01-19T03:00302259
2025-01-19T04:00272056
2025-01-19T05:00252056
2025-01-19T06:00272160
2025-01-19T07:00292055
2025-01-19T08:00291956
2025-01-19T09:00261953
2025-01-19T10:00262053
2025-01-19T11:00211850
2025-01-19T12:00201639
2025-01-19T13:00211744
2025-01-19T14:00251547
2025-01-19T15:00241446
2025-01-19T16:00271339
2025-01-19T17:00281636
2025-01-19T18:00261734
2025-01-19T19:00291737
2025-01-19T20:00313138
2025-01-19T21:00332347
2025-01-19T22:00321943
2025-01-19T23:00321941
2025-01-20T00:00311840
2025-01-20T01:00311839
2025-01-20T02:00311939
2025-01-20T03:00281943
2025-01-20T04:00271839
2025-01-20T05:00221839
2025-01-20T06:00181956
2025-01-20T07:00191955
2025-01-20T08:00191953
2025-01-20T09:00162054
2025-01-20T10:00161955
2025-01-20T11:0091554
2025-01-20T12:00121746
2025-01-20T13:00141451
2025-01-20T14:00141451
2025-01-20T15:0014

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