Salt Lake County—3 Day Forecast
Last Updated: June 24, 2026 7:47 PM
Employers activate mandatory trip reduction programs. Individuals should TravelWise by consolidating trips and choose cleaner transportation options. Limit volatile organic compound (VOC) emissions. Smoke from wild fires could cause high concentrations of particulate matter. If smoke becomes thick, persons with existing heart or respiratory ailments should reduce physical exertion and outdoor activity. Wild Fire Outlooks. There is a possibility of blowing dust due to strong winds. Try to avoid outdoor activity if blowing dust is observed. People with existing heart or respiratory ailments should take proper precautions.
Download the UtahAir app on: 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.
| Action Forecast |
|---|
Unrestricted Action |
Voluntary Action |
Mandatory Action |
| Health Forecast | ||
|---|---|---|
| Air Quality Index (AQI) | PM 2.5 | Ozone |
| Good | 0 - 9.0 µg/m3 | 0 - 0.054 ppm |
| Moderate | 9.1 - 35.4 µg/m3 | 0.055 - 0.070 ppm |
| Unhealthy for Sensitive Groups | 35.5 - 55.4 µg/m3 | 0.071 - 0.085 ppm |
| Unhealthy | 55.5 - 125.4 µg/m3 | 0.086 - 0.105 ppm |
| Very Unhealthy | 125.5 - 225.4 µg/m3 | 0.106 - 0.200 ppm |
| Hazardous | Above 225.5 µg/m3 | Above 0.201 ppm |
| Based on a 24-hour average. | Based on an 8-hour average. | |
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