SmogRank / World / United States / Washington / July 2024
Most polluted cities in Washington, United States, July 2024
40 cities in Washington, United States ranked by their average PM2.5 over the 31 days. Worst: Toppenish at 13.6 µg/m³, #225 of 2,519 cities in the world. Cleanest: Tulalip at 3.0. 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.
- 1Toppenish 10%
- 2Yakima 6%
- 3Sunnyside 3%
- 4Parkland 3%
- 5Spokane 0%
- 6Prosser 0%
- 7Spokane Valley 0%
- 8Mead 0%
- 8Pullman 0%
- 10Walla Walla 0%
- 11Airway Heights 0%
- 12Ephrata 0%
- 13Tri-Cities 0%
- 14Moses Lake 0%
- 15Renton 0%
- 15White Center 0%
- 17Quincy 0%
- 17Seattle 0%
- 19Auburn 0%
- 20Lynden 0%
- 21Bellingham 0%
- 22Wenatchee 0%
- 23Tacoma 0%
- 24Ellensburg 0%
- 25Lacey 0%
- 26Shoreline 0%
- 27North Bend 0%
- 27Ridgefield 0%
- 29Longview 0%
- 30Oak Harbor 0%
- 30Vancouver 0%
- 32Bremerton 0%
- 33Chehalis 0%
- 34Mount Vernon 0%
- 35Port Angeles 0%
- 35Port Townsend 0%
- 35Shelton 0%
- 38Aberdeen 0%
- 39Bellevue 0%
- 40Tulalip 0%
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
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SmogRank, most polluted cities in Washington, United States, PM2.5, July 2024, smogrank.com/us/region/washington/history/2024-07 (accessed 6 Oct 2026).
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