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
Every city in Ireland ranked for January 2026, one column each, worst on the left and cleanest on the right. 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
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. 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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