SmogRank / World / Czechia / May 2023

Most polluted cities in Czechia, May 2023

30 cities in Czechia ranked by their average PM2.5 over the 31 days. Worst: Havířov at 15.7 µg/m³, #64 of 1,267 cities in the world. Cleanest: Sokolov at 9.4. A city needs measurements on 70% of the days to be ranked.

← Havířov 15.7
Every city in Czechia ranked for May 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. 1HavířovMoravian-Silesian Region
    27
  2. 2Český TěšínMoravian-Silesian Region
    25
  3. 3Frýdek-MístekMoravian-Silesian Region
    25
  4. 4OstravaMoravian-Silesian Region
    23
  5. 4DěčínÚstí nad Labem Region
    23
  6. 6BohumínMoravian-Silesian Region
    23
  7. 7OpavaMoravian-Silesian Region
    22
  8. 8KladnoCentral Bohemia
    22
  9. 9BerounCentral Bohemia
    22
  10. 10TřinecMoravian-Silesian Region
    20
  11. 11KadaňÚstí nad Labem Region
    20
  12. 12Valašské MeziříčíZlín
    20
  13. 13MostÚstí nad Labem Region
    20
  14. 14PřerovOlomouc Region
    20
  15. 15OlomoucOlomouc Region
    20
  16. 16LiberecLiberec Region
    20
  17. 17Hradec KrálovéHradec Králové Region
    20
  18. 18PraguePrague
    18
  19. 19PardubicePardubice Region
    18
  20. 20Mladá BoleslavCentral Bohemia
    18
  21. 21ZnojmoSouth Moravian
    18
  22. 21LitvínovÚstí nad Labem Region
    18
  23. 23České BudějoviceSouth Bohemian Region
    18
  24. 24TepliceÚstí nad Labem Region
    17
  25. 25PilsenPlzeň Region
    17
  26. 25KroměřížZlín
    17
  27. 27Ústí nad LabemÚstí nad Labem Region
    17
  28. 28ŽideniceSouth Moravian
    17
  29. 29BrnoSouth Moravian
    17
  30. 30SokolovCarlsbad 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

All cities in the world, May 2023 · Czechia now

Use this board

SmogRank, most polluted cities in Czechia, PM2.5, May 2023, smogrank.com/cz/history/2023-05 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.