SmogRank / Countries / United States / Washington

Most polluted cities in Washington, United States

40 measured cities ranked by PM2.5, last 7 days. Worst: Columbia City at 6.1 µg/m³, #1499 in the world.

#City µg/m³
1Columbia City Washington
6.1
2Tacoma Washington
5.6
3Auburn Washington
5.4
4Renton Washington
5.1
5Sunnyside Washington
4.9
6Bellingham Washington
4.8
7Vancouver Washington
4.8
8Pullman Washington
4.6
9Seattle Washington
4.6
10Kent Washington
4.5
11Lacey Washington
4.1
12Parkland Washington
4.1
13Port Angeles Washington
4.1
14Bremerton Washington
4.0
15Longview Washington
3.9
16Shoreline Washington
3.9
17Marysville Washington
3.8
18Centralia Washington
3.7
19Burien Washington
3.5
20Aberdeen Washington
3.4
21Bellevue Washington
3.4
22Spokane Valley Washington
3.4
23Picnic Point-North Lynnwood Washington
3.4
24Salmon Creek Washington
3.3
25Walla Walla Washington
3.3
26Tri-Cities Washington
3.2
27Wenatchee Washington
3.1
28Spokane Washington
3.0
29Yakima Washington
3.0
30Mount Vernon Washington
2.9
31Anacortes Washington
2.7
32Pasco Washington
2.7
33Ellensburg Washington
2.5
34Kennewick Washington
2.3
35Monroe low-cost sensorsWashington
2.1
36Inglewood-Finn Hill low-cost sensorsWashington
1.6
37Bothell low-cost sensorsWashington
1.4
38Kirkland low-cost sensorsWashington
1.1
39Union Hill-Novelty Hill low-cost sensorsWashington
1.1
40North Creek low-cost sensorsWashington
1.0
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.

City7-day estimateBand
Everett estimated≈ 5 µg/m³Good
Federal Way estimated≈ 5 µg/m³Good
Lakewood estimated≈ 5 µg/m³Good
Olympia estimated≈ 4 µg/m³Good
Richland estimated≈ 4 µg/m³Good
South Hill estimated≈ 4 µg/m³Good
Sammamish estimated≈ 4 µg/m³Good
City of Sammamish estimated≈ 4 µg/m³Good
Edmonds estimated≈ 5 µg/m³Good
Puyallup estimated≈ 4 µg/m³Good
Lynnwood estimated≈ 5 µg/m³Good
West Lake Sammamish estimated≈ 4 µg/m³Good
University Place estimated≈ 5 µg/m³Good
Des Moines estimated≈ 5 µg/m³Good
Lake Stevens estimated≈ 4 µg/m³Good
East Hill-Meridian estimated≈ 5 µg/m³Good
SeaTac estimated≈ 5 µg/m³Good
Spanaway estimated≈ 5 µg/m³Good
Maple Valley estimated≈ 3 µg/m³Good
Mercer Island estimated≈ 5 µg/m³Good
Bainbridge Island estimated≈ 5 µg/m³Good
Graham estimated≈ 4 µg/m³Good
Cottage Lake estimated≈ 4 µg/m³Good
Kenmore estimated≈ 5 µg/m³Good
Camas estimated≈ 4 µg/m³Good
Mukilteo estimated≈ 5 µg/m³Good
West Lake Stevens estimated≈ 4 µg/m³Good
Mountlake Terrace estimated≈ 5 µg/m³Good
Silver Firs estimated≈ 4 µg/m³Good
Eastmont estimated≈ 4 µg/m³Good
Mill Creek estimated≈ 5 µg/m³Good
Tukwila estimated≈ 5 µg/m³Good
Bonney Lake estimated≈ 3 µg/m³Good
Hazel Dell estimated≈ 3 µg/m³Good
Battle Ground estimated≈ 4 µg/m³Good
Silverdale estimated≈ 3 µg/m³Good
Covington estimated≈ 3 µg/m³Good
Tumwater estimated≈ 4 µg/m³Good
Fairwood estimated≈ 5 µg/m³Good
Arlington estimated≈ 4 µg/m³Good

Updated 2026-10-01 08:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.