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 Jul 2026 That day's board

The worst cities in Poland for PM2.5 over the 30 days to 11 Jul 2026: Kalisz 13.3 µg/m³, Wrocław 12.0 µg/m³ and Gorzów Wielkopolski 11.7 µg/m³.

  1. 1KaliszGreater Poland13.3
  2. 2WrocławLower Silesia12.0
  3. 3Gorzów WielkopolskiLubusz11.7
  4. 4RadomskoŁódź Voivodeship11.6
  5. 5OtwockMazovia11.5
  6. 6Jastrzębie ZdrójSilesia11.3
  7. 7ŁaskŁódź Voivodeship10.7
  8. 8KrakówLesser Poland10.5
  9. 9StarachowiceŚwiętokrzyskie10.4
  10. 10ŻywiecSilesia10.2
  11. 11ŁódźŁódź Voivodeship10.2
  12. 12GdyniaPomerania10.2
  13. 13ToruńKujawsko-Pomorskie10.0
  14. 14PołaniecŚwiętokrzyskie9.9
  15. 15RadomMazovia9.8
  16. 16RzeszówSubcarpathia9.7
  17. 17NiskoSubcarpathia9.5
  18. 18ZgierzŁódź Voivodeship9.5
  19. 19KłodzkoLower Silesia9.2
  20. 20KielceŚwiętokrzyskie9.1

+ 38 more cities, 9.1 µg/m³ and below

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.