Last Updated: December 15, 2025 15:35:42
| County | Mon. Dec. 15, 2025 | Tue. Dec. 16, 2025 | Wed. Dec. 17, 2025 | Advisory Message |
|---|---|---|---|---|
| Salt Lake | Moderate | Moderate | Moderate | Individuals are asked to voluntarily not use solid fuel burning devices, reduce/stop open burning, and reduce vehicle use by consolidating trips. Salt Lake County prohibits burning solid fuel in fireplaces or wood burning stoves and bans outdoor fires (including bonfires, patio pits and charcoal grill fires) on days that the State of Utah designates as either mandatory or voluntary air action (no burn) days. Salt Lake County Health Regulation 35 |
Voluntary |
Mandatory |
Mandatory |
||
| Davis | Moderate | Moderate | Moderate | Individuals are asked to voluntarily not use solid fuel burning devices, reduce/stop open burning, and reduce vehicle use by consolidating trips. |
Voluntary |
Voluntary |
Voluntary |
||
| Utah | Moderate | Moderate | Moderate | Individuals are asked to voluntarily not use solid fuel burning devices, reduce/stop open burning, and reduce vehicle use by consolidating trips. |
Voluntary |
Voluntary |
Voluntary |
||
| Weber | Moderate | Moderate | Moderate | Individuals are asked to voluntarily not use solid fuel burning devices, reduce/stop open burning, and reduce vehicle use by consolidating trips. |
Voluntary |
Voluntary |
Voluntary |
||
| Box Elder | Moderate | Moderate | Moderate | Individuals are asked to voluntarily not use solid fuel burning devices, reduce/stop open burning, and reduce vehicle use by consolidating trips. |
Voluntary |
Voluntary |
Voluntary |
||
| Cache | Moderate | Moderate | Moderate | Individuals are asked to voluntarily not use solid fuel burning devices, reduce/stop open burning, and reduce vehicle use by consolidating trips. |
Unrestricted |
Unrestricted |
Unrestricted |
||
| Tooele | Good | Moderate | Moderate | |
Unrestricted |
Unrestricted |
Unrestricted |
||
| Wasatch | Good | Good | Good | |
Unrestricted |
Unrestricted |
Unrestricted |
||
| Washington | Good | Good | Good | |
Unrestricted |
Unrestricted |
Unrestricted |
||
| Iron | Good | Good | Good | |
Unrestricted |
Unrestricted |
Unrestricted |
||
| Carbon | Good | Good | Good | |
Unrestricted |
Unrestricted |
Unrestricted |
||
| Grand | Moderate | Moderate | Moderate | |
Unrestricted |
Unrestricted |
Unrestricted |
||
| Duchesne | Good | Good | Good | |
Unrestricted |
Unrestricted |
Unrestricted |
||
| Uintah | Good | Good | Good | |
Unrestricted |
Unrestricted |
Unrestricted |
| 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. | |