SmogRank / Countries / United States / Wyoming
Most polluted cities in Wyoming, United States
6 measured cities ranked by PM2.5, last 7 days. Worst: Sheridan at 5.1 µg/m³, #1807 in the world.
| # | City | µg/m³ | |
|---|---|---|---|
| 1 | Sheridan Wyoming | 5.1 | |
| 2 | Casper Wyoming | 2.9 | |
| 3 | Gillette Wyoming | 2.7 | |
| 4 | Rock Springs Wyoming | 2.5 | |
| 5 | Cheyenne Wyoming | 2.2 | |
| 6 | Laramie Wyoming | 2.1 |
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data
Updated 2026-10-01 10:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.