SmogRank / World / Ireland / May 2026

Most polluted cities in Ireland, May 2026

22 cities in Ireland ranked by their average PM2.5 over the 31 days. Worst: Tralee at 7.8 µg/m³, #1,302 of 2,522 cities in the world. Cleanest: Bray at 4.3. A city needs measurements on 70% of the days to be ranked.

← Tralee 7.8 µg/m³ 20 µg/m³0
Every city in Ireland ranked for May 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. 1TraleeMunster
    43
  2. 2WaterfordMunster
    38
  3. 3CorkMunster
    34
  4. 4EnnisMunster
    33
  5. 5GreystonesLeinster
    32
  6. 5AthloneLeinster
    32
  7. 7PortlaoiseLeinster
    32
  8. 7LetterkennyUlster
    32
  9. 9GalwayConnacht
    31
  10. 10WexfordLeinster
    31
  11. 10DublinLeinster
    31
  12. 12NavanLeinster
    29
  13. 13Dún LaoghaireLeinster
    29
  14. 14NaasLeinster
    28
  15. 14LimerickMunster
    28
  16. 14LeixlipLeinster
    28
  17. 14CarlowLeinster
    28
  18. 18SligoConnacht
    28
  19. 19DroghedaLeinster
    27
  20. 19Cluain MealaMunster
    27
  21. 21TallaghtLeinster
    27
  22. 22BrayLeinster
    24
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, May 2026 · Ireland now

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

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