SmogRank / Countries / Ireland / August 2026

Most polluted cities in Ireland, August 2026

18 cities in Ireland ranked by their average PM2.5 over the 31 days. Worst: Navan at 6.9 µg/m³, #1,661 of 2,312 cities in the world. Cleanest: Cork at 4.4. A city needs measurements on 70% of the days to be ranked.

  1. 1NavanLeinster
    6.9
  2. 2DroghedaLeinster
    6.5
  3. 3DublinLeinster
    6.4
  4. 4DundalkLeinster
    6.0
  5. 5TraleeMunster
    5.6
  6. 5LetterkennyUlster
    5.6
  7. 5LeixlipLeinster
    5.6
  8. 5CarlowLeinster
    5.6
  9. 9SligoConnacht
    5.5
  10. 10WaterfordMunster
    5.4
  11. 11EnnisMunster
    5.3
  12. 12GreystonesLeinster
    5.2
  13. 12GalwayConnacht
    5.2
  14. 14WexfordLeinster
    5.1
  15. 14LimerickMunster
    5.1
  16. 16Cluain MealaMunster
    4.8
  17. 17BrayLeinster
    4.5
  18. 18CorkMunster
    4.4
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, August 2026 · Ireland now

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

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