SO2—Trend Charts
Box Elder
Cache
Carbon
Davis
Duchesne
Grand
Iron
Salt Lake
Tooele
Uintah
Utah
Wasatch
Washington
Weber
| BG | SM | |
| ED | HV | HB |
| BV | HW | RS |
| EN | LN | V4 |
| HC | P2 | M7 |
PM 2.5
PM 10
Ozone
Nitrogen Oxides (NO)
Carbon Monoxide (CO)
Sulfur Dioxide (SO2)
Temperature
Wind
Solar Radiation
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 particulates in populated areas. If smoke becomes thick, persons with existing heart or respiratory ailments should reduce physical exertion and outdoor activity. Wild Fire Outlooks
Last Updated: June 21, 2026 4:00 AM
(Data Not Quality Assured)
graphing
graphing
graphing
graphing
graphing
Phone forecasts for all counties 801-536-0072 or toll-free 1-800-228-5434.
Sign up for Email Alerts.
Download the UtahAir app on: | 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. | |