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 Aug 2025 That day's board

The worst cities in Poland for PM2.5 over the 30 days to 9 Aug 2025: Otwock 18.0 µg/m³, Gdynia 12.3 µg/m³ and Łask 11.9 µg/m³.

  1. 1OtwockMazovia18.0
  2. 2GdyniaPomerania12.3
  3. 3ŁaskŁódź Voivodeship11.9
  4. 4WrocławLower Silesia11.6
  5. 5ŁódźŁódź Voivodeship11.6
  6. 6KaliszGreater Poland11.6
  7. 7AugustówPodlasie10.9
  8. 8Skarżysko-KamiennaŚwiętokrzyskie10.8
  9. 9NiskoSubcarpathia10.8
  10. 10KutnoŁódź Voivodeship10.8
  11. 11Jastrzębie ZdrójSilesia10.6
  12. 12GdańskPomerania10.6
  13. 13PoznańGreater Poland10.4
  14. 14ToruńKujawsko-Pomorskie10.3
  15. 15RadomskoŁódź Voivodeship10.2
  16. 16WschowaLubusz10.1
  17. 17RadomMazovia9.7
  18. 18WłocławekKujawsko-Pomorskie9.7
  19. 19ZamośćLublin9.3
  20. 20PruszkówMazovia9.3

+ 40 more cities, 9.3 µg/m³ and below

Not counted on this day, too few days measured: Tomaszów Lubelski since 10 Jul 2025, Siedlce since 10 Jul 2025, Żywiec since 10 Jul 2025 and 5 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.