SmogRank / Countries / Slovakia / July 2026

Most polluted cities in Slovakia, July 2026

30 cities in Slovakia ranked by their average PM2.5 over the 31 days. Worst: Trnava at 12.4 µg/m³, #643 of 2,262 cities in the world. Cleanest: Banská Bystrica at 5.4. A city needs measurements on 70% of the days to be ranked.

  1. 1TrnavaTrnava Region
    12.4
  2. 2KomárnoNitra Region
    11.6
  3. 3PrešovPrešov Region
    11.4
  4. 4TrebišovKošice Region
    11.0
  5. 5ŽilinaŽilina Region
    10.2
  6. 6SenicaTrnava Region
    10.1
  7. 7KošiceKošice Region
    9.9
  8. 7MalackyBratislava Region
    9.9
  9. 9NitraNitra Region
    9.8
  10. 10SenecBratislava Region
    9.7
  11. 11Vranov nad TopľouPrešov Region
    9.4
  12. 11SereďTrnava Region
    9.4
  13. 13PezinokBratislava Region
    9.2
  14. 14MartinŽilina Region
    9.0
  15. 14BratislavaBratislava Region
    9.0
  16. 16ZvolenBanská Bystrica Region
    8.9
  17. 17SninaPrešov Region
    8.8
  18. 17BardejovPrešov Region
    8.8
  19. 17Žiar nad HronomBanská Bystrica Region
    8.8
  20. 20HumennéPrešov Region
    8.6
  21. 20Liptovský Mikulᚎilina Region
    8.6
  22. 22RužomberokŽilina Region
    8.3
  23. 22PúchovTrenčín Region
    8.3
  24. 24PrievidzaTrenčín Region
    8.1
  25. 24LučenecBanská Bystrica Region
    8.1
  26. 26PopradPrešov Region
    8.0
  27. 27ČadcaŽilina Region
    7.4
  28. 28PartizánskeTrenčín Region
    6.6
  29. 29Devínska Nová VesBratislava Region
    5.6
  30. 30Banská BystricaBanská Bystrica Region
    5.4
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, July 2026, smogrank.com/sk/history/2026-07 (accessed 2 Oct 2026).

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