SmogRank / World / United States / Oregon / December 2024
Most polluted cities in Oregon, United States, December 2024
41 cities in Oregon, United States ranked by their average PM2.5 over the 31 days. Worst: Medford at 13.0 µg/m³, #591 of 2,573 cities in the world. Cleanest: Roseburg at 3.1. 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.
- 1Medford 0%
- 2Altamont 0%
- 3Ontario 0%
- 4Prineville 0%
- 5Baker City 0%
- 6Cottage Grove 0%
- 7Grants Pass 0%
- 8Salem 0%
- 9Woodburn 0%
- 10Eugene 0%
- 11Madras 0%
- 12Hillsboro 0%
- 13Tigard 0%
- 14Green 0%
- 15La Grande 0%
- 16Albany 0%
- 16Bend 0%
- 18Sweet Home 0%
- 18The Dalles 0%
- 20Ashland 0%
- 20Milwaukie 0%
- 22Stayton 0%
- 23Coos Bay 0%
- 24Pendleton 0%
- 25McMinnville 0%
- 25Silverton 0%
- 27Talent 0%
- 28Canby 0%
- 28Redmond 0%
- 30Corvallis 0%
- 31Dallas 0%
- 32Hood River 0%
- 33Beaverton 0%
- 34Forest Grove 0%
- 35Portland 0%
- 36Newport 0%
- 37Florence 0%
- 38North Portland 0%
- 39Brookings 0%
- 40Gresham 0%
- 41Roseburg 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
All cities in the world, December 2024 · All cities in United States, December 2024 · Oregon now
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SmogRank, most polluted cities in Oregon, United States, PM2.5, December 2024, smogrank.com/us/region/oregon/history/2024-12 (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.