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 to6 Jan 2026 That day's board

The worst cities in Poland for PM2.5 over the 30 days to 6 Jan 2026: Żywiec 40.9 µg/m³, Zgierz 33.1 µg/m³ and Radomsko 31.6 µg/m³.

  1. 1ŻywiecSilesia40.9
  2. 2ZgierzŁódź Voivodeship33.1
  3. 3RadomskoŁódź Voivodeship31.6
  4. 4Skarżysko-KamiennaŚwiętokrzyskie31.5
  5. 5KłodzkoLower Silesia30.4
  6. 6KaliszGreater Poland29.4
  7. 7ŁaskŁódź Voivodeship29.0
  8. 8Jelenia GóraLower Silesia28.4
  9. 9Gorzów WielkopolskiLubusz28.3
  10. 10KutnoŁódź Voivodeship28.2
  11. 11WłocławekKujawsko-Pomorskie26.0
  12. 12NiskoSubcarpathia24.9
  13. 13KrakówLesser Poland24.9
  14. 14AugustówPodlasie24.6
  15. 15PoznańGreater Poland24.3
  16. 16Czechowice-DziedziceSilesia23.8
  17. 17PołaniecŚwiętokrzyskie23.7
  18. 18TarnówLesser Poland23.6
  19. 19OtwockMazovia23.6
  20. 20ŁódźŁódź Voivodeship23.3

+ 42 more cities, 23.2 µg/m³ and below

Not counted on this day, too few days measured: 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.