SmogRank / Countries / United States / South Dakota
Most polluted cities in South Dakota, United States
5 measured cities ranked by PM2.5, last 7 days. Worst: Sioux Falls at 5.6 µg/m³, #1660 in the world.
| # | City | µg/m³ | |
|---|---|---|---|
| 1 | Sioux Falls South Dakota | 5.6 | |
| 2 | Rapid City South Dakota | 5.3 | |
| 3 | Brookings South Dakota | 3.5 | |
| 4 | Aberdeen South Dakota | 3.2 | |
| 5 | Watertown South Dakota | 2.5 |
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data
Estimated: cities without a monitor
South Dakota cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Mitchell estimated | ≈ 4 µg/m³ |
Updated 2026-10-01 11:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.