SmogRank / World / United States / Oregon / April 2026
Most polluted cities in Oregon, United States, April 2026
42 cities in Oregon, United States ranked by their average PM2.5 over the 30 days. Worst: Bend at 5.8 µg/m³, #2,243 of 2,914 cities in the world. Cleanest: McMinnville at 1.8. 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.
- 1Bend 0%
- 2Grants Pass 0%
- 3Stayton 0%
- 3Tigard 0%
- 5Hillsboro 0%
- 5Ontario 0%
- 5Salem 0%
- 8Coos Bay 0%
- 9Altamont 0%
- 9Hood River 0%
- 11Cottage Grove 0%
- 12La Grande 0%
- 13Baker City 0%
- 13Canby 0%
- 13Gresham 0%
- 13Medford 0%
- 17Madras 0%
- 18Albany 0%
- 18Eugene 0%
- 18Portland 0%
- 18The Dalles 0%
- 22Florence 0%
- 22Oregon City 0%
- 24Ashland 0%
- 24Green 0%
- 26Milwaukie 0%
- 26Silverton 0%
- 26Woodburn 0%
- 29Beaverton 0%
- 29Pendleton 0%
- 29Roseburg 0%
- 32North Portland 0%
- 32Redmond 0%
- 34Prineville 0%
- 34Talent 0%
- 36Brookings 0%
- 37Corvallis 0%
- 37Newport 0%
- 39Dallas 0%
- 40Forest Grove 0%
- 40Sweet Home 0%
- 42McMinnville 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, April 2026, smogrank.com/us/region/oregon/history/2026-04 (accessed 6 Oct 2026).
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.