Last Updated: August 17, 2026 08:30:39
County
Mon. Aug. 17, 2026
Tue. Aug. 18, 2026
Wed. Aug. 19, 2026
Advisory Message
Salt Lake
Moderate
Moderate
Moderate
Individuals are asked to voluntarily TravelWise by consolidating trips and choose cleaner transportation options. Limit volatile organic compound (VOC) emissions.
Voluntary
Voluntary
Voluntary
Davis
Moderate
Moderate
Moderate
Individuals are asked to voluntarily TravelWise by consolidating trips and choose cleaner transportation options. Limit volatile organic compound (VOC) emissions.
Voluntary
Voluntary
Voluntary
Utah
Moderate
Moderate
Moderate
Unrestricted
Voluntary
Voluntary
Weber
Moderate
Moderate
Moderate
Individuals are asked to voluntarily TravelWise by consolidating trips and choose cleaner transportation options. Limit volatile organic compound (VOC) emissions.
Voluntary
Unrestricted
Unrestricted
Box Elder
Moderate
Moderate
Moderate
Individuals are asked to voluntarily TravelWise by consolidating trips and choose cleaner transportation options. Limit volatile organic compound (VOC) emissions.
Voluntary
Unrestricted
Unrestricted
Cache
Good
Good
Good
Unrestricted
Unrestricted
Unrestricted
Tooele
Moderate
Moderate
Moderate
Unrestricted
Unrestricted
Unrestricted
Wasatch
Moderate
Moderate
Moderate
Unrestricted
Unrestricted
Unrestricted
Washington
Good
Good
Good
Unrestricted
Unrestricted
Unrestricted
Iron
Good
Good
Good
Unrestricted
Unrestricted
Unrestricted
Carbon
Moderate
Moderate
Moderate
Unrestricted
Unrestricted
Unrestricted
Grand
Moderate
Moderate
Moderate
Unrestricted
Unrestricted
Unrestricted
Duchesne
Moderate
Moderate
Moderate
Individuals are asked to voluntarily TravelWise by consolidating trips and choose cleaner transportation options. Limit volatile organic compound (VOC) emissions.
Voluntary
Unrestricted
Unrestricted
Uintah
Moderate
Moderate
Moderate
Individuals are asked to voluntarily TravelWise by consolidating trips and choose cleaner transportation options. Limit volatile organic compound (VOC) emissions.
Voluntary
Unrestricted
Unrestricted
Explanation
The forecast indicates the highest pollution level of the day. During the summer,
Ozone pollution levels are generally low during the morning, evening and night.
During the winter, particulate matter (i.e., PM 2.5) pollution levels build up until a storm
or weather system moves the air out of the valley.
The health forecast helps to determine how the highest pollution level of the day will affect people
with various health conditions. Click on the “Health Forecast” legend to plan your physical activity to help
minimize the effects of pollution on your health.
The action forecast notifies the public of the voluntary or mandatory actions (e.g., carpooling, wood burning)
they need to adhere to for the current pollution levels. Click on the “Action Forecast” legend for a
description of the action regulations.
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Action Forecast
Unrestricted Action
Voluntary Action
Mandatory Action
Health Forecast
Air Quality Index (AQI)
Ozone
PM 2.5
PM 10
Good
0 - 0.054 ppm
0 - 9.0 µg/m3
0 - 54.0 µg/m3
Moderate
0.055 - 0.070 ppm
9.1 - 35.4 µg/m3
54.1 - 154.0 µg/m3
Unhealthy for Sensitive Groups
0.071 - 0.085 ppm
35.5 - 55.4 µg/m3
154.1 - 254.0 µg/m3
Unhealthy
0.086 - 0.105 ppm
55.5 - 125.4 µg/m3
254.1 - 354.0 µg/m3
Very Unhealthy
0.106 - 0.200 ppm
125.5 - 225.4 µg/m3
354.1 - 424.0 µg/m3
Hazardous
Above 0.201 ppm
Above 225.5 µg/m3
Above 424.1 µg/m3
Based on an 8-hour average.
Based on a 24-hour average.
Based on a 24-hour average.
Historical Air Quality Forecasts
Ozone (No Drive)
| Action Forecasts by Date
Particulate (Action Days)
| Action Forecast by Date
Current Air Pollution
Phone App
Look for the Utah Air phone app on Android and iPhone stores.
Media
Forecasts at a Glance
Current Conditions at a Glance
