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 to7 Dec 2025 That day's board

The worst cities in Poland for PM2.5 over the 30 days to 7 Dec 2025: Żywiec 56.5 µg/m³, Kalisz 30.5 µg/m³ and Zgierz 30.2 µg/m³.

  1. 1ŻywiecSilesia56.5
  2. 2KaliszGreater Poland30.5
  3. 3ZgierzŁódź Voivodeship30.2
  4. 4WłocławekKujawsko-Pomorskie29.3
  5. 5Skarżysko-KamiennaŚwiętokrzyskie29.0
  6. 6ŁaskŁódź Voivodeship29.0
  7. 7RadomskoŁódź Voivodeship28.0
  8. 8KutnoŁódź Voivodeship28.0
  9. 9Jastrzębie ZdrójSilesia27.6
  10. 10PruszkówMazovia26.5
  11. 11PoznańGreater Poland25.7
  12. 12Czechowice-DziedziceSilesia25.2
  13. 13Gorzów WielkopolskiLubusz25.0
  14. 14ToruńKujawsko-Pomorskie24.8
  15. 15TarnówLesser Poland24.6
  16. 16WrocławLower Silesia23.8
  17. 17AugustówPodlasie23.7
  18. 18OtwockMazovia23.5
  19. 19ŻaryLubusz23.5
  20. 20KrakówLesser Poland23.4

+ 43 more cities, 23.3 µg/m³ and below

Not counted on this day, too few days measured: Bielsko-Biala since 21 Oct 2025, Tomaszów Lubelski since 19 Oct 2025, Siedlce since 19 Oct 2025 and 3 more cities.

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.