This page provides access to real-time mobile and fixed-site provisional air quality observations collected within the previous hour from resources across Utah. Included are fixed-site monitors deployed by the Utah Division of Air Quality, the University of Utah, and others. Additionally, monitors deployed on UTA TRAX light rail cars, UTA electric buses, and other vehicles may also be displayed.

*Note: The particulate observations shown here are from a wide variety of sensors, each with their own strengths and weaknesses. Some sensors (deployed on the mobile platforms and some fixed sites) can occasionally record higher values when the air contains a lot of PM2.5 as well as excess moisture (such as dense fog).

The compressed menu on the top-right corner of the map can be used to show or hide measurements from these various resources.

Change Variable Displayed: Data Time Zone:

On the map above, square markers are primarily fixed-site observations made available courtesy of data aggregation services by Synoptic Data PBC. Circle markers represent data collected from mobile platforms managed by the University of Utah Department of Atmospheric Sciences. The larger markers represent the most recent collected observation, with trailing transparent markers representing older observations as the platform moves.

Weather observations from Synoptic Data PBC can be plotted by clicking the "Load Weather Obs" button on the map. Observations will be plotted in wind barb format similar to MesoWest. Red numbers indicate temperature in degrees Celsius. Green numbers indicate relative humidity. Wind barbs show wind speed in meters per second (one full barb is 5 meters per second). Wind gust values larger than 5 meters per second are also shown in yellow if available.