SmogRank / World / Ireland / Leinster / January 2024
Most polluted cities in Leinster, Ireland, January 2024
2 cities in Leinster, Ireland ranked by their average PM2.5 over the 31 days. Worst: Dún Laoghaire at 8.9 µg/m³, #1,029 of 2,341 cities in the world. Cleanest: Dublin at 8.4. A city needs measurements on 70% of the days to be ranked.
Leinster has 15 cities ranked over the last 30 days, but only 2 here: most of its monitors have no readings for January 2024 in OpenAQ's archive, where ours come from, or too few to rank. Cities missing from this board weren't clean, just not measured.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Dún Laoghaire 0%
- 2Dublin 0%
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
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SmogRank, most polluted cities in Leinster, Ireland, PM2.5, January 2024, smogrank.com/ie/region/leinster/history/2024-01 (accessed 6 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.