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 to9 Jan 2026 That day's board

The worst cities in Poland for PM2.5 over the 30 days to 9 Jan 2026: Żywiec 44.7 µg/m³, Kłodzko 36.8 µg/m³ and Zgierz 33.8 µg/m³.

  1. 1ŻywiecSilesia44.7
  2. 2KłodzkoLower Silesia36.8
  3. 3ZgierzŁódź Voivodeship33.8
  4. 4RadomskoŁódź Voivodeship33.1
  5. 5KaliszGreater Poland31.1
  6. 6ŁaskŁódź Voivodeship30.3
  7. 7Jelenia GóraLower Silesia30.3
  8. 8Gorzów WielkopolskiLubusz29.8
  9. 9KutnoŁódź Voivodeship28.6
  10. 10WłocławekKujawsko-Pomorskie26.2
  11. 11OpoleOpole Voivodeship26.2
  12. 12TarnówLesser Poland25.9
  13. 13WrocławLower Silesia25.6
  14. 14PoznańGreater Poland25.5
  15. 15NiskoSubcarpathia25.4
  16. 16Jastrzębie ZdrójSilesia24.9
  17. 17PołaniecŚwiętokrzyskie24.8
  18. 18KrakówLesser Poland24.7
  19. 19Czechowice-DziedziceSilesia24.4
  20. 20RzeszówSubcarpathia23.9

+ 40 more cities, 23.8 µg/m³ and below

Not counted on this day, too few days measured: Skarżysko-Kamienna since 7 Jan 2026 and Świecie since 24 Dec 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.