SmogRank / World / Poland / Pomerania / 2025
Most polluted cities in Pomerania, Poland, 2025
4 cities in Pomerania, Poland ranked by their average PM2.5 over the 365 days; 4 above the WHO annual guideline (5.0 µg/m³). Worst: Gdynia at 14.6 µg/m³, #431 of 2,624 cities in the world. Cleanest: Bytów at 9.6. A city needs measurements on 70% of the days to be ranked.
About 18.1K people in this city breathed unhealthy air on an average day of 2025.
Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.
- 1Gdańsk 18.1K
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, 2025 · All cities in Poland, 2025 · Pomerania now
Use this board
SmogRank, most polluted cities in Pomerania, Poland, PM2.5, 2025, smogrank.com/pl/region/pomerania/history/2025 (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.