SmogRank / Countries / United States / Iowa
Most polluted cities in Iowa, United States
9 measured cities ranked by PM2.5, last 7 days. Worst: Waterloo at 8.1 µg/m³, #917 in the world.
| # | City | µg/m³ | |
|---|---|---|---|
| 1 | Waterloo Iowa | 8.1 | |
| 2 | Davenport Iowa | 7.3 | |
| 3 | Cedar Rapids Iowa | 7.0 | |
| 4 | Muscatine Iowa | 6.7 | |
| 5 | Clinton Iowa | 6.5 | |
| 6 | Iowa City Iowa | 6.4 | |
| 7 | Ankeny Iowa | 6.1 | |
| 8 | Fort Dodge Iowa | 5.7 | |
| 9 | Des Moines Iowa | 5.4 |
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
Iowa 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 |
|---|---|
| Sioux City estimated | ≈ 5 µg/m³ |
| Ames estimated | ≈ 6 µg/m³ |
| West Des Moines estimated | ≈ 7 µg/m³ |
| Council Bluffs estimated | ≈ 5 µg/m³ |
| Dubuque estimated | ≈ 6 µg/m³ |
| Urbandale estimated | ≈ 7 µg/m³ |
| Cedar Falls estimated | ≈ 6 µg/m³ |
| Marion estimated | ≈ 6 µg/m³ |
| Bettendorf estimated | ≈ 7 µg/m³ |
| Marshalltown estimated | ≈ 5 µg/m³ |
| Mason City estimated | ≈ 5 µg/m³ |
| Burlington estimated | ≈ 6 µg/m³ |
| Ottumwa estimated | ≈ 6 µg/m³ |
| Johnston estimated | ≈ 7 µg/m³ |
| Coralville estimated | ≈ 6 µg/m³ |
| Waukee estimated | ≈ 6 µg/m³ |
| Altoona estimated | ≈ 7 µg/m³ |
| North Liberty estimated | ≈ 6 µg/m³ |
| Indianola estimated | ≈ 6 µg/m³ |
| Clive estimated | ≈ 7 µg/m³ |
| Newton estimated | ≈ 6 µg/m³ |
Updated 2026-10-01 07:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.