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 to12 Jan 2026 That day's board

The worst cities in Poland for PM2.5 over the 30 days to 12 Jan 2026: Żywiec 45.6 µg/m³, Kłodzko 38.1 µg/m³ and Zgierz 34.1 µg/m³.

  1. 1ŻywiecSilesia45.6
  2. 2KłodzkoLower Silesia38.1
  3. 3ZgierzŁódź Voivodeship34.1
  4. 4RadomskoŁódź Voivodeship33.9
  5. 5KaliszGreater Poland31.4
  6. 6ŁaskŁódź Voivodeship30.7
  7. 7Jelenia GóraLower Silesia29.7
  8. 8Gorzów WielkopolskiLubusz29.7
  9. 9KutnoŁódź Voivodeship29.3
  10. 10TarnówLesser Poland27.7
  11. 11WłocławekKujawsko-Pomorskie26.0
  12. 12OpoleOpole Voivodeship25.9
  13. 13Jastrzębie ZdrójSilesia25.9
  14. 14NiskoSubcarpathia25.8
  15. 15WrocławLower Silesia25.8
  16. 16Czechowice-DziedziceSilesia25.2
  17. 17OtwockMazovia25.1
  18. 18PoznańGreater Poland24.8
  19. 19KrakówLesser Poland24.7
  20. 20PołaniecŚwiętokrzyskie24.6

+ 39 more cities, 24.3 µg/m³ and below

Not counted on this day, too few days measured: Sulechów since 11 Jan 2026, 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.