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.

CountriesCities
The 30 days to11 Sep 2025 That day's board

The worst cities in Poland for PM2.5 over the 30 days to 11 Sep 2025: Kalisz 14.2 µg/m³, Zamość 12.8 µg/m³ and Nisko 12.8 µg/m³.

  1. 1KaliszGreater Poland14.2
  2. 2ZamośćLublin12.8
  3. 3NiskoSubcarpathia12.8
  4. 4JarosławSubcarpathia12.8
  5. 5Jastrzębie ZdrójSilesia12.8
  6. 6ŁaskŁódź Voivodeship12.3
  7. 7WrocławLower Silesia12.0
  8. 8PrzemyślSubcarpathia11.9
  9. 9KutnoŁódź Voivodeship11.7
  10. 10GdyniaPomerania11.6
  11. 11Bielsko-BialaSilesia11.6
  12. 12OtwockMazovia11.4
  13. 13ŁódźŁódź Voivodeship11.4
  14. 14RadomskoŁódź Voivodeship11.3
  15. 15RadomMazovia11.1
  16. 16ToruńKujawsko-Pomorskie10.9
  17. 17PoznańGreater Poland10.9
  18. 18GdańskPomerania10.6
  19. 19ŻyrardówMazovia10.5
  20. 20KrakówLesser Poland10.4

+ 45 more cities, 10.3 µg/m³ and below

Not counted on this day, too few days measured: Augustów since 16 Aug 2025.

30 days7 days
GoodModerateSensitive groupsUnhealthyVery unhealthyHazardousWHO 24-hour guideline, 15 µg/m³Fades where it stood: not counted that 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.