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 Apr 2026 That day's board

The worst cities in Poland for PM2.5 over the 30 days to 12 Apr 2026: Łask 45.7 µg/m³, Żywiec 31.9 µg/m³ and Otwock 30.9 µg/m³.

  1. 1ŁaskŁódź Voivodeship45.7
  2. 2ŻywiecSilesia31.9
  3. 3OtwockMazovia30.9
  4. 4KaliszGreater Poland29.2
  5. 5RadomskoŁódź Voivodeship28.0
  6. 6Jastrzębie ZdrójSilesia24.5
  7. 7KłodzkoLower Silesia24.4
  8. 8Czechowice-DziedziceSilesia23.8
  9. 9ZgierzŁódź Voivodeship23.7
  10. 10Gorzów WielkopolskiLubusz23.3
  11. 11DębicaSubcarpathia23.2
  12. 12TarnówLesser Poland22.9
  13. 13RzeszówSubcarpathia22.6
  14. 14WłocławekKujawsko-Pomorskie21.9
  15. 15StarachowiceŚwiętokrzyskie21.3
  16. 16ZamośćLublin21.0
  17. 17JarosławSubcarpathia20.9
  18. 18MielecSubcarpathia20.5
  19. 19NiskoSubcarpathia20.4
  20. 20KrakówLesser Poland20.0

+ 39 more cities, 19.9 µg/m³ and below

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.