SmogRank / World / Ireland / August 2025

Most polluted cities in Ireland, August 2025

18 cities in Ireland ranked by their average PM2.5 over the 31 days. Worst: Ennis at 8.4 µg/m³, #1,492 of 2,503 cities in the world. Cleanest: Greystones at 5.7. A city needs measurements on 70% of the days to be ranked.

← Ennis 8.4
Every city in Ireland ranked for August 2025, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1EnnisMunster
    8.4
  2. 2SligoConnacht
    8.0
  3. 3TraleeMunster
    7.7
  4. 4LimerickMunster
    7.6
  5. 4GalwayConnacht
    7.6
  6. 6CorkMunster
    7.5
  7. 7WaterfordMunster
    7.3
  8. 8DublinLeinster
    7.1
  9. 8AthloneLeinster
    7.1
  10. 10PortlaoiseLeinster
    7.0
  11. 11DroghedaLeinster
    6.9
  12. 12Dún LaoghaireLeinster
    6.8
  13. 13WexfordLeinster
    6.7
  14. 14LetterkennyUlster
    6.6
  15. 15LeixlipLeinster
    6.4
  16. 16NaasLeinster
    6.3
  17. 17Cluain MealaMunster
    6.0
  18. 18GreystonesLeinster
    5.7
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

PM2.5 in µg/m³, coloured by the US EPA's PM2.5 categories. 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, August 2025 · Ireland now

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SmogRank, most polluted cities in Ireland, PM2.5, August 2025, smogrank.com/ie/history/2025-08 (accessed 2 Oct 2026).

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