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
    3
  2. 2WexfordLeinster
    2
  3. 3AthloneLeinster
    1
  4. 4Cluain MealaMunster
    1
  5. 5GreystonesLeinster
    1
  6. 6NaasLeinster
    1
  7. 6DroghedaLeinster
    1
  8. 8LeixlipLeinster
    1
Low risk1–3
Moderate risk4–6
High risk7–10
Very high risk10+

Canada's AQHI+ for PM2.5 (1 point per 10 µg/m³), which is defined on hourly values. 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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