SmogRank / World / Czechia / February 2023

Most polluted cities in Czechia, February 2023

36 cities in Czechia ranked by their average PM2.5 over the 28 days. Worst: Bohumín at 23.3 µg/m³, #73 of 1,175 cities in the world. Cleanest: Sokolov at 11.3. A city needs measurements on 70% of the days to be ranked.

OpenAQ's archive, where our readings come from, has almost none for 25 of these 28 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; many cities elsewhere are missing from this board, not clean. Why.

← Bohumín 23.3 µg/m³ 20 µg/m³0
Every city in Czechia ranked for February 2023, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1BohumínMoravian-Silesian Region
    3
  2. 2HavířovMoravian-Silesian Region
    3
  3. 3Český TěšínMoravian-Silesian Region
    3
  4. 4OstravaMoravian-Silesian Region
    3
  5. 4DěčínÚstí nad Labem Region
    3
  6. 6Valašské MeziříčíZlín
    3
  7. 6TřinecMoravian-Silesian Region
    3
  8. 8Frýdek-MístekMoravian-Silesian Region
    3
  9. 9KarvináMoravian-Silesian Region
    3
  10. 10PřerovOlomouc Region
    2
  11. 11ZlínZlín
    2
  12. 12OlomoucOlomouc Region
    2
  13. 12HraniceOlomouc Region
    2
  14. 14OpavaMoravian-Silesian Region
    2
  15. 15BerounCentral Bohemia
    2
  16. 16PardubicePardubice Region
    2
  17. 16Hradec KrálovéHradec Králové Region
    2
  18. 16HodonínSouth Moravian
    2
  19. 19Mladá BoleslavCentral Bohemia
    2
  20. 20TepliceÚstí nad Labem Region
    2
  21. 21JihlavaVysocina
    2
  22. 22Ústí nad LabemÚstí nad Labem Region
    2
  23. 23MostÚstí nad Labem Region
    2
  24. 24PilsenPlzeň Region
    2
  25. 25PraguePrague
    2
  26. 26BrnoSouth Moravian
    2
  27. 27KroměřížZlín
    2
  28. 28LitvínovÚstí nad Labem Region
    2
  29. 28KladnoCentral Bohemia
    2
  30. 30ZnojmoSouth Moravian
    2
  31. 30ŽideniceSouth Moravian
    2
  32. 32LiberecLiberec Region
    2
  33. 33České BudějoviceSouth Bohemian Region
    2
  34. 34KadaňÚstí nad Labem Region
    2
  35. 35Žďár nad SázavouVysocina
    2
  36. 36SokolovCarlsbad Region
    2
Low risk1–3
Moderate risk4–6
High risk7–10
Very high risk10+

Canada's AQHI+ for PM2.5 (1 point per 10 µg/m³), which is defined on hourly values. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, February 2023 · Czechia now

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SmogRank, most polluted cities in Czechia, PM2.5, February 2023, smogrank.com/cz/history/2023-02 (accessed 2 Oct 2026).

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