SmogRank / Countries / Ireland / July 2026

Most polluted cities in Ireland, July 2026

21 cities in Ireland ranked by their average PM2.5 over the 31 days. Worst: Waterford at 8.4 µg/m³, #1,439 of 2,262 cities in the world. Cleanest: Letterkenny at 4.7. A city needs measurements on 70% of the days to be ranked.

  1. 1WaterfordMunster
    8.4
  2. 2Dún LaoghaireLeinster
    7.3
  3. 3DroghedaLeinster
    7.2
  4. 4DublinLeinster
    7.1
  5. 5CarlowLeinster
    6.6
  6. 5BrayLeinster
    6.6
  7. 7LeixlipLeinster
    6.5
  8. 8NaasLeinster
    6.3
  9. 8GreystonesLeinster
    6.3
  10. 10NavanLeinster
    6.2
  11. 11AthloneLeinster
    5.7
  12. 12CorkMunster
    5.6
  13. 13TraleeMunster
    5.5
  14. 14DundalkLeinster
    5.4
  15. 15Cluain MealaMunster
    5.3
  16. 16LimerickMunster
    5.1
  17. 16GalwayConnacht
    5.1
  18. 18WexfordLeinster
    5.0
  19. 18EnnisMunster
    5.0
  20. 20SligoConnacht
    4.9
  21. 21LetterkennyUlster
    4.7
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, July 2026 · Ireland now