SmogRank / World / Ireland / January 2026

Most polluted cities in Ireland, January 2026

8 cities in Ireland ranked by their average PM2.5 over the 31 days. Worst: Tralee at 21.5 µg/m³, #329 of 2,281 cities in the world. Cleanest: Leixlip at 7.2. A city needs measurements on 70% of the days to be ranked.

← Tralee 21.5 µg/m³ 20 µg/m³0
Every city in Ireland ranked for January 2026, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1TraleeMunster
    74
  2. 2WexfordLeinster
    58
  3. 3AthloneLeinster
    51
  4. 4Cluain MealaMunster
    44
  5. 5GreystonesLeinster
    42
  6. 6NaasLeinster
    41
  7. 6DroghedaLeinster
    41
  8. 8LeixlipLeinster
    40
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). 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, January 2026 · Ireland now

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SmogRank, most polluted cities in Ireland, PM2.5, January 2026, smogrank.com/ie/history/2026-01 (accessed 2 Oct 2026).

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