SmogRank / Countries / United States / Wyoming
Most polluted cities in Wyoming, United States
5 measured cities ranked by PM2.5, last 30 days. Worst: Sheridan at 5.2 µg/m³, #1676 in the world.
| # | City | µg/m³ | |
|---|---|---|---|
| 1 | Sheridan Wyoming | 5.2 | |
| 2 | Casper Wyoming | 3.0 | |
| 3 | Gillette Wyoming | 2.6 | |
| 4 | Cheyenne Wyoming | 2.4 | |
| 5 | Laramie Wyoming | 1.9 |
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 07:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.