SmogRank / World / Poland / Greater Poland / September 2025
Most polluted cities in Greater Poland, Poland, September 2025
2 cities in Greater Poland, Poland ranked by their average PM2.5 over the 30 days. Worst: Kalisz at 12.9 µg/m³, #391 of 3,052 cities in the world. Cleanest: Poznań at 10.0. A city needs measurements on 70% of the days to be ranked.
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, September 2025 · All cities in Poland, September 2025 · Greater Poland now
Use this board
SmogRank, most polluted cities in Greater Poland, Poland, PM2.5, September 2025, smogrank.com/pl/region/greater-poland/history/2025-09 (accessed 7 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.