SmogRank / World / United States / Oregon / June 2026
Most polluted cities in Oregon, United States, June 2026
43 cities in Oregon, United States ranked by their average PM2.5 over the 30 days. Worst: The Dalles at 4.6 µg/m³, #2,187 of 2,466 cities in the world. Cleanest: Sweet Home at 1.5. 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.
- 1The Dalles 0%
- 2Florence 0%
- 3Hood River 0%
- 3Ontario 0%
- 5Coos Bay 0%
- 5Tigard 0%
- 7Gresham 0%
- 8Baker City 0%
- 9Ashland 0%
- 10Canby 0%
- 11Hermiston 0%
- 12Cottage Grove 0%
- 12Eugene 0%
- 12Stayton 0%
- 15Albany 0%
- 15Hillsboro 0%
- 15Medford 0%
- 15Salem 0%
- 19La Grande 0%
- 19Madras 0%
- 19Oregon City 0%
- 19Portland 0%
- 23Altamont 0%
- 23Beaverton 0%
- 23Pendleton 0%
- 26Brookings 0%
- 26Milwaukie 0%
- 26Roseburg 0%
- 26Silverton 0%
- 30Green 0%
- 31Woodburn 0%
- 32Bend 0%
- 32Corvallis 0%
- 32Newport 0%
- 35Grants Pass 0%
- 35Talent 0%
- 37Forest Grove 0%
- 37McMinnville 0%
- 37North Portland 0%
- 37Redmond 0%
- 41Dallas 0%
- 41Prineville 0%
- 43Sweet Home 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 Oregon, United States, PM2.5, June 2026, smogrank.com/us/region/oregon/history/2026-06 (accessed 6 Oct 2026).
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