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
    21.5
  2. 2WexfordLeinster
    13.1
  3. 3AthloneLeinster
    9.3
  4. 4Cluain MealaMunster
    8.0
  5. 5GreystonesLeinster
    7.5
  6. 6NaasLeinster
    7.3
  7. 6DroghedaLeinster
    7.3
  8. 8LeixlipLeinster
    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+

PM2.5 in µg/m³, coloured by the US EPA's PM2.5 categories. 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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