SmogRank / World / Europe / Poland / Greater Poland
Most polluted cities in Greater Poland, Poland
2 measured cities, this year; 2 above the WHO annual guideline. Worst: Kalisz at 24.5 µg/m³, #271 in the world.
About 86.8K people in this city breathed unhealthy air on an average day so far this year.
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.
Cities coloured by their PM2.5 over the last 24 hours. Fires, smoke and ash: Oct 5, the newest UTC day mapped.
- 1Poznańlast full day 29 Sept 86.8K
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
Estimated: cities without a monitor
Greater Poland cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Konin | ≈ 21 µg/m³ |
| Piła | ≈ 12 µg/m³ |
| Ostrów Wielkopolski | ≈ 24 µg/m³ |
| Gniezno | ≈ 20 µg/m³ |
| Leszno | ≈ 18 µg/m³ |
| Śrem | ≈ 21 µg/m³ |
| Turek | ≈ 25 µg/m³ |
| Krotoszyn | ≈ 22 µg/m³ |
| Swarzędz | ≈ 21 µg/m³ |
| Września | ≈ 20 µg/m³ |
| Luboń | ≈ 21 µg/m³ |
| Wągrowiec | ≈ 15 µg/m³ |
| Jarocin | ≈ 21 µg/m³ |
| Kościan | ≈ 20 µg/m³ |
| Koło | ≈ 21 µg/m³ |
| Środa Wielkopolska | ≈ 21 µg/m³ |
| Rawicz | ≈ 21 µg/m³ |
| Gostyń | ≈ 21 µg/m³ |
| Chodzież | ≈ 15 µg/m³ |
| Szamotuły | ≈ 14 µg/m³ |
| Złotów | ≈ 12 µg/m³ |
| Oborniki | ≈ 15 µg/m³ |
| Pleszew | ≈ 23 µg/m³ |
| Trzcianka | ≈ 11 µg/m³ |
| Nowy Tomyśl | ≈ 15 µg/m³ |
Bad-air episodes in Greater Poland
- Slovakia, Czechia and Poland, June 202627 to 28 June 2026, 2 days18 cities33 µg/m³peak, Krompachy
- Eastern Europe, 10 to 12 April 20263 days36 cities60 µg/m³peak, Radomsko
- Poland, Hungary and 2 more countries, April 20262 to 3 April 2026, 2 days10 cities50 µg/m³peak, Łask
- Europe, 18 to 25 March 20268 days430 cities136 µg/m³peak, Łask
- Europe, 1 to 12 March 202612 days532 cities109 µg/m³peak, Radomsko
- Germany, Poland and Czechia, February 202617 to 18 February 2026, 2 days67 cities91 µg/m³peak, Kalisz
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
Use this board
SmogRank, most polluted cities in Greater Poland, Poland, PM2.5, this year to 6 Oct 2026, 23:00 UTC, smogrank.com/pl/region/greater-poland?w=year.
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.
Updated 2026-10-06 23:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.