SmogRank / Countries / Ireland / December 2025

Most polluted cities in Ireland, December 2025

8 cities in Ireland ranked by their average PM2.5 over the 31 days. Worst: Tralee at 19.0 µg/m³, #373 of 2,360 cities in the world. Cleanest: Drogheda at 7.2. A city needs measurements on 70% of the days to be ranked.

  1. 1TraleeMunster
    19.0
  2. 2AthloneLeinster
    11.3
  3. 3Cluain MealaMunster
    10.8
  4. 4WexfordLeinster
    10.0
  5. 5NaasLeinster
    8.8
  6. 6GreystonesLeinster
    7.7
  7. 7LeixlipLeinster
    7.4
  8. 8DroghedaLeinster
    7.2
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, December 2025 · Ireland now