SmogRank / Countries / Ireland / 2026

Most polluted cities in Ireland, 2026

10 cities in Ireland ranked by their average PM2.5 so far (273 of 365 days); 10 above the WHO annual guideline (5.0 µg/m³). Worst: Tralee at 9.3 µg/m³, #860 of 2,181 cities in the world. Cleanest: Cluain Meala at 6.1. A city needs measurements on 70% of the days to be ranked.

  1. 1TraleeMunster
    9.31.9×
  2. 2WexfordLeinster
    7.91.6×
  3. 3AthloneLeinster
    7.51.5×
  4. 4DublinLeinster
    6.81.4×
  5. 5DroghedaLeinster
    6.51.3×
  6. 6LeixlipLeinster
    6.41.3×
  7. 7GreystonesLeinster
    6.21.2×
  8. 7CarlowLeinster
    6.21.2×
  9. 9NaasLeinster
    6.11.2×
  10. 9Cluain MealaMunster
    6.11.2×
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, 2026 · Ireland now

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

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