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 14 Apr 2025: Krotoszyn 33.2 µg/m³, Otwock 27.4 µg/m³ and Kłodzko 27.2 µg/m³.
- 1KrotoszynGreater Poland33.2
- 2OtwockMazovia27.4
- 3KłodzkoLower Silesia27.2
- 4Jastrzębie ZdrójSilesia27.2
- 5ŻywiecSilesia27.1
- 6ŁaskŁódź Voivodeship26.8
- 7Bielsko-BialaSilesia25.8
- 8Czechowice-DziedziceSilesia24.8
- 9LubańLower Silesia24.4
- 10KaliszGreater Poland24.2
- 11Skarżysko-KamiennaŚwiętokrzyskie23.3
- 12ŁódźŁódź Voivodeship22.7
- 13WłocławekKujawsko-Pomorskie22.5
- 14Tomaszów LubelskiLublin22.3
- 15RzeszówSubcarpathia21.8
- 16KatowiceSilesia21.7
- 17RadomMazovia21.4
- 18DębicaSubcarpathia21.4
- 19PoznańGreater Poland21.4
- 20RadomskoŁódź Voivodeship21.0
+ 52 more cities, 20.8 µg/m³ and below
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 readers for them. Most cities there are missing from this board, not clean. Why.