SmogRank / History / City race
Cities in Poland, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in Poland for PM2.5 over the 30 days to 17 Apr 2025: Krotoszyn 30.0 µg/m³, Otwock 26.3 µg/m³ and Kłodzko 25.3 µg/m³.
- 1KrotoszynGreater Poland30.0
- 2OtwockMazovia26.3
- 3KłodzkoLower Silesia25.3
- 4Jastrzębie ZdrójSilesia25.3
- 5ŁaskŁódź Voivodeship25.0
- 6ŻywiecSilesia24.6
- 7Bielsko-BialaSilesia23.4
- 8KaliszGreater Poland23.1
- 9Czechowice-DziedziceSilesia23.1
- 10WłocławekKujawsko-Pomorskie22.5
- 11ŁódźŁódź Voivodeship22.5
- 12Tomaszów LubelskiLublin22.4
- 13LubańLower Silesia22.4
- 14Skarżysko-KamiennaŚwiętokrzyskie21.6
- 15PoznańGreater Poland21.3
- 16AugustówPodlasie20.8
- 17ZamośćLublin20.7
- 18KatowiceSilesia20.7
- 19RzeszówSubcarpathia20.5
- 20LublinLublin20.3
+ 52 more cities, the next at 20.3 µg/m³
Not counted on this day, too few days measured: Wysokie Mazowieckie since 1 Apr 2025, Kutno since 14 Mar 2025 and Wodzisław Śląski since 1 Mar 2025.
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites. We are building the reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.