SmogRank / Countries / Slovakia / 2025

Most polluted cities in Slovakia, 2025

32 cities in Slovakia ranked by their average PM2.5 over the 365 days; 32 above the WHO annual guideline (5.0 µg/m³). Worst: Lučenec at 16.1 µg/m³, #220 of 2,131 cities in the world. Cleanest: Poprad at 9.2. A city needs measurements on 70% of the days to be ranked.

  1. 1LučenecBanská Bystrica Region
    16.13.2×
  2. 2PrešovPrešov Region
    15.83.2×
  3. 3KošiceKošice Region
    14.83.0×
  4. 3RužomberokŽilina Region
    14.83.0×
  5. 3MartinŽilina Region
    14.83.0×
  6. 6ŽilinaŽilina Region
    14.72.9×
  7. 7TrebišovKošice Region
    14.22.8×
  8. 8PúchovTrenčín Region
    14.12.8×
  9. 8ČadcaŽilina Region
    14.12.8×
  10. 10HumennéPrešov Region
    13.92.8×
  11. 11Vranov nad TopľouPrešov Region
    13.42.7×
  12. 12BardejovPrešov Region
    13.22.6×
  13. 12ZvolenBanská Bystrica Region
    13.22.6×
  14. 14PezinokBratislava Region
    13.02.6×
  15. 15Liptovský Mikulᚎilina Region
    12.82.6×
  16. 16TrenčínTrenčín Region
    12.52.5×
  17. 17SereďTrnava Region
    11.62.3×
  18. 17BratislavaBratislava Region
    11.62.3×
  19. 19TrnavaTrnava Region
    11.52.3×
  20. 19SenicaTrnava Region
    11.52.3×
  21. 19NitraNitra Region
    11.52.3×
  22. 19KomárnoNitra Region
    11.52.3×
  23. 23PrievidzaTrenčín Region
    11.42.3×
  24. 24PartizánskeTrenčín Region
    11.32.3×
  25. 25MalackyBratislava Region
    11.22.2×
  26. 25HandlováTrenčín Region
    11.22.2×
  27. 27SenecBratislava Region
    10.92.2×
  28. 28SninaPrešov Region
    10.52.1×
  29. 28Žiar nad HronomBanská Bystrica Region
    10.52.1×
  30. 28Banská BystricaBanská Bystrica Region
    10.52.1×
  31. 31Devínska Nová VesBratislava Region
    10.22.0×
  32. 32PopradPrešov Region
    9.21.8×
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

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SmogRank, most polluted cities in Slovakia, PM2.5, 2025, smogrank.com/sk/history/2025 (accessed 2 Oct 2026).

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