SmogRank / World / Ireland / October 2026

Most polluted cities in Ireland, October 2026

25 cities in Ireland ranked by their average PM2.5 so far (1 of 31 days). Worst: Wexford at 8.3 µg/m³, #1,382 of 2,606 cities in the world. Cleanest: Greystones at 4.8. A city needs measurements on 70% of the days to be ranked.

← Wexford 8.3 µg/m³ 20 µg/m³0
Every city in Ireland 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. 1WexfordLeinster
    46
  2. 2WaterfordMunster
    44
  3. 3CorkMunster
    37
  4. 4Cluain MealaMunster
    37
  5. 5CarlowLeinster
    36
  6. 6TraleeMunster
    36
  7. 7GalwayConnacht
    35
  8. 8LetterkennyUlster
    34
  9. 9AthloneLeinster
    34
  10. 10DublinLeinster
    33
  11. 11TallaghtLeinster
    33
  12. 11PortlaoiseLeinster
    33
  13. 11LeixlipLeinster
    33
  14. 14NavanLeinster
    32
  15. 14EnnisMunster
    32
  16. 16LimerickMunster
    32
  17. 16BlanchardstownLeinster
    32
  18. 18DroghedaLeinster
    31
  19. 19NaasLeinster
    30
  20. 20Dún LaoghaireLeinster
    29
  21. 21DundalkLeinster
    29
  22. 22SwordsLeinster
    28
  23. 22SligoConnacht
    28
  24. 24BrayLeinster
    27
  25. 25GreystonesLeinster
    27
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 · Ireland now

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

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