SmogRank / Countries / United States / Washington
Most polluted cities in Washington, United States
36 measured cities ranked by PM2.5, this year. Worst: Redmond at 11.1 µg/m³, #497 in the world.
| # | City | µg/m³ | |
|---|---|---|---|
| 1 | Redmond low-cost sensorsWashington | 11.1 | |
| 2 | Wenatchee Washington | 10.5 | |
| 3 | Spokane Washington | 8.8 | |
| 4 | Moses Lake Washington | 8.6 | |
| 5 | Spokane Valley Washington | 8.5 | |
| 6 | Yakima Washington | 8.5 | |
| 7 | Walla Walla Washington | 8.3 | |
| 8 | Sunnyside Washington | 8.2 | |
| 9 | Ellensburg Washington | 7.4 | |
| 10 | Tri-Cities Washington | 7.2 | |
| 11 | Columbia City Washington | 6.8 | |
| 12 | Tacoma Washington | 6.6 | |
| 13 | Auburn Washington | 6.4 | |
| 14 | Renton Washington | 6.3 | |
| 15 | Seattle Washington | 6.2 | |
| 16 | Pullman Washington | 6.0 | |
| 17 | Vancouver Washington | 5.9 | |
| 18 | Bellingham Washington | 5.6 | |
| 19 | Port Angeles Washington | 5.6 | |
| 20 | Picnic Point-North Lynnwood Washington | 5.4 | |
| 21 | Parkland Washington | 5.3 | |
| 22 | Shoreline Washington | 5.0 | |
| 23 | Bremerton Washington | 4.9 | |
| 24 | Centralia Washington | 4.9 | |
| 25 | Kent Washington | 4.8 | |
| 26 | Lacey Washington | 4.7 | |
| 27 | Burien Washington | 4.6 | |
| 28 | Salmon Creek Washington | 4.6 | |
| 29 | Longview Washington | 4.5 | |
| 30 | Aberdeen Washington | 3.7 | |
| 31 | Bellevue Washington | 3.6 | |
| 32 | Kirkland low-cost sensorsWashington | 3.6 | |
| 33 | Union Hill-Novelty Hill low-cost sensorsWashington | 3.6 | |
| 34 | Bothell low-cost sensorsWashington | 3.0 | |
| 35 | Mount Vernon Washington | 2.9 | |
| 36 | Anacortes Washington | 2.7 |
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
Washington 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 |
|---|---|
| Everett estimated | ≈ 5 µg/m³ |
| Federal Way estimated | ≈ 5 µg/m³ |
| Lakewood estimated | ≈ 5 µg/m³ |
| Olympia estimated | ≈ 4 µg/m³ |
| Richland estimated | ≈ 4 µg/m³ |
| South Hill estimated | ≈ 4 µg/m³ |
| Sammamish estimated | ≈ 4 µg/m³ |
| City of Sammamish estimated | ≈ 4 µg/m³ |
| Edmonds estimated | ≈ 5 µg/m³ |
| Puyallup estimated | ≈ 4 µg/m³ |
| Lynnwood estimated | ≈ 5 µg/m³ |
| West Lake Sammamish estimated | ≈ 4 µg/m³ |
| University Place estimated | ≈ 5 µg/m³ |
| Des Moines estimated | ≈ 5 µg/m³ |
| Lake Stevens estimated | ≈ 4 µg/m³ |
| East Hill-Meridian estimated | ≈ 5 µg/m³ |
| SeaTac estimated | ≈ 5 µg/m³ |
| Spanaway estimated | ≈ 5 µg/m³ |
| Maple Valley estimated | ≈ 3 µg/m³ |
| Mercer Island estimated | ≈ 5 µg/m³ |
| Bainbridge Island estimated | ≈ 5 µg/m³ |
| Graham estimated | ≈ 4 µg/m³ |
| Cottage Lake estimated | ≈ 4 µg/m³ |
| Kenmore estimated | ≈ 5 µg/m³ |
| Camas estimated | ≈ 4 µg/m³ |
| Mukilteo estimated | ≈ 5 µg/m³ |
| West Lake Stevens estimated | ≈ 4 µg/m³ |
| Mountlake Terrace estimated | ≈ 5 µg/m³ |
| Silver Firs estimated | ≈ 4 µg/m³ |
| Eastmont estimated | ≈ 4 µg/m³ |
| Mill Creek estimated | ≈ 5 µg/m³ |
| Tukwila estimated | ≈ 5 µg/m³ |
| Bonney Lake estimated | ≈ 3 µg/m³ |
| Hazel Dell estimated | ≈ 3 µg/m³ |
| Battle Ground estimated | ≈ 4 µg/m³ |
| Silverdale estimated | ≈ 3 µg/m³ |
| Covington estimated | ≈ 3 µg/m³ |
| Tumwater estimated | ≈ 4 µg/m³ |
| Fairwood estimated | ≈ 5 µg/m³ |
| Arlington estimated | ≈ 4 µg/m³ |
Updated 2026-10-01 16:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.