SmogRank / World / United States / Washington / November 2025

Most polluted cities in Washington, United States, November 2025

43 cities in Washington, United States ranked by their average PM2.5 over the 30 days. Worst: Wenatchee at 12.0 µg/m³, #755 of 2,662 cities in the world. Cleanest: Mount Vernon at 1.4. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Wenatchee 0% 0.75%0
Every city in Washington, United States ranked for November 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Wenatchee
    0%
  2. 2Yakima
    0%
  3. 3Mead
    0%
  4. 4Toppenish
    0%
  5. 5Sunnyside
    0%
  6. 6Spokane
    0%
  7. 7Vancouver
    0%
  8. 8Spokane Valley
    0%
  9. 9Port Angeles
    0%
  10. 10Moses Lake
    0%
  11. 11Grandview
    0%
  12. 12Walla Walla
    0%
  13. 13Parkland
    0%
  14. 14Airway Heights
    0%
  15. 15Ephrata
    0%
  16. 15White Center
    0%
  17. 17Lacey
    0%
  18. 18Auburn
    0%
  19. 18Prosser
    0%
  20. 20Tacoma
    0%
  21. 20Picnic Point-North Lynnwood
    0%
  22. 22Seattle
    0%
  23. 22Shelton
    0%
  24. 24Bellingham
    0%
  25. 25Renton
    0%
  26. 26Pullman
    0%
  27. 27Ridgefield
    0%
  28. 28Bremerton
    0%
  29. 28Columbia Citylow-cost sensors
    0%
  30. 28Quincy
    0%
  31. 28Shoreline
    0%
  32. 32Lynden
    0%
  33. 33Aberdeen
    0%
  34. 33Oak Harbor
    0%
  35. 35Port Townsend
    0%
  36. 36Burien
    0%
  37. 36Inglewood-Finn Hilllow-cost sensors
    0%
  38. 38Kirklandlow-cost sensors
    0%
  39. 39Bellevue
    0%
  40. 40Redmondlow-cost sensors
    0%
  41. 41Bothelllow-cost sensors
    0%
  42. 42Union Hill-Novelty Hilllow-cost sensors
    0%
  43. 43Mount Vernon
    0%

Low-cost sensors: consumer units, counted only in cities with no government-grade monitor; they read close to reference monitors on the whole, but 15 to 25% high in humid air. How we use them.

Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, November 2025 · All cities in United States, November 2025 · Washington now

Use this board

SmogRank, most polluted cities in Washington, United States, PM2.5, November 2025, smogrank.com/us/region/washington/history/2025-11 (accessed 6 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.