SmogRank / World / Slovakia / October 2026

Most polluted cities in Slovakia, October 2026

22 cities in Slovakia ranked by their average PM2.5 so far (1 of 31 days). Worst: Trenčín at 15.0 µg/m³, #214 of 1,630 cities in the world. Cleanest: Banská Bystrica at 6.4. A city needs measurements on 70% of the days to be ranked.

← Trenčín 15.0 µg/m³ 20 µg/m³0
Every city in Slovakia ranked for October 2026, 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. 1TrenčínTrenčín Region
    62
  2. 2RužomberokŽilina Region
    61
  3. 3ZvolenBanská Bystrica Region
    59
  4. 4MalackyBratislava Region
    58
  5. 5Vranov nad TopľouPrešov Region
    58
  6. 6MartinŽilina Region
    58
  7. 7HumennéPrešov Region
    57
  8. 8KošiceKošice Region
    57
  9. 8Liptovský Mikulᚎilina Region
    57
  10. 10NitraNitra Region
    57
  11. 11ŽilinaŽilina Region
    56
  12. 12BratislavaBratislava Region
    56
  13. 13SereďTrnava Region
    55
  14. 14TrnavaTrnava Region
    55
  15. 15PartizánskeTrenčín Region
    52
  16. 16Žiar nad HronomBanská Bystrica Region
    52
  17. 17BardejovPrešov Region
    52
  18. 18Devínska Nová VesBratislava Region
    51
  19. 19SninaPrešov Region
    42
  20. 19KomárnoNitra Region
    42
  21. 21HandlováTrenčín Region
    36
  22. 21Banská BystricaBanská Bystrica Region
    36
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). 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, October 2026 · Slovakia now

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SmogRank, most polluted cities in Slovakia, PM2.5, October 2026 (so far), smogrank.com/sk/history/2026-10 (accessed 2 Oct 2026).

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