SmogRank / World / Czechia / October 2023

Most polluted cities in Czechia, October 2023

29 cities in Czechia ranked by their average PM2.5 over the 31 days. Worst: Děčín at 15.5 µg/m³, #58 of 1,686 cities in the world. Cleanest: Pilsen at 8.6. A city needs measurements on 70% of the days to be ranked.

← Děčín 15.5
Every city in Czechia ranked for October 2023, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1DěčínÚstí nad Labem Region
    27
  2. 2BerounCentral Bohemia
    23
  3. 3OlomoucOlomouc Region
    22
  4. 3BohumínMoravian-Silesian Region
    22
  5. 5OstravaMoravian-Silesian Region
    22
  6. 5Hradec KrálovéHradec Králové Region
    22
  7. 7MostÚstí nad Labem Region
    20
  8. 8Ústí nad LabemÚstí nad Labem Region
    20
  9. 8OpavaMoravian-Silesian Region
    20
  10. 10ZnojmoSouth Moravian
    18
  11. 10TepliceÚstí nad Labem Region
    18
  12. 12PřerovOlomouc Region
    18
  13. 12KadaňÚstí nad Labem Region
    18
  14. 12HavířovMoravian-Silesian Region
    18
  15. 15LitvínovÚstí nad Labem Region
    18
  16. 16Mladá BoleslavCentral Bohemia
    18
  17. 17PraguePrague
    18
  18. 17Český TěšínMoravian-Silesian Region
    18
  19. 19PardubicePardubice Region
    18
  20. 20ŽideniceSouth Moravian
    17
  21. 20České BudějoviceSouth Bohemian Region
    17
  22. 22Valašské MeziříčíZlín
    17
  23. 23Frýdek-MístekMoravian-Silesian Region
    17
  24. 23BrnoSouth Moravian
    17
  25. 25LiberecLiberec Region
    17
  26. 26SokolovCarlsbad Region
    15
  27. 27TřinecMoravian-Silesian Region
    15
  28. 28ZlínZlín
    15
  29. 29PilsenPlzeň Region
    15
Good0–50
Satisfactory51–100
Moderate101–200
Poor201–300
Very poor301–400
Severe401+

India's National Air Quality Index (CPCB), PM2.5 sub-index. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

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SmogRank, most polluted cities in Czechia, PM2.5, October 2023, smogrank.com/cz/history/2023-10 (accessed 2 Oct 2026).

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