SmogRank / World / Europe / Ireland / Leinster
Most polluted cities in Leinster, Ireland
15 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Edenderry at 8.0 µg/m³, #983 in the world.
About 0 people in this city breathed unhealthy air on an average day over the last 30 days.
Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.
- 1Leixliplast full day 3 Oct 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
Estimated: cities without a monitor
Leinster cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Droichead Nua | ≈ 4 µg/m³ |
| An Muileann gCearr | ≈ 4 µg/m³ |
| Sandyford | ≈ 5 µg/m³ |
| Balbriggan | ≈ 6 µg/m³ |
| Kilkenny | ≈ 5 µg/m³ |
| Celbridge | ≈ 5 µg/m³ |
| Finglas | ≈ 5 µg/m³ |
| Rathfarnham | ≈ 5 µg/m³ |
| Maynooth | ≈ 5 µg/m³ |
| Malahide | ≈ 6 µg/m³ |
| Tullamore | ≈ 4 µg/m³ |
| Lucan | ≈ 5 µg/m³ |
Bad-air episodes in Leinster
- Europe, 18 to 25 March 20268 days430 cities136 µg/m³peak, Łask
- Europe, March 202519 to 30 March 2025, 12 days401 cities83 µg/m³peak, Kikinda
- Germany, Poland and 25 more countries, March 20253 to 13 March 2025, 11 days553 cities152 µg/m³peak, Negotin
- Europe, 14 February to 1 March 202516 days619 cities178 µg/m³peak, Krotoszyn
- Western Europe, January 20259 to 12 January 2025, 4 days57 cities53 µg/m³peak, Le Havre
- France, Belgium and 2 more countries, November and December 202330 November to 2 December 2023, 3 days49 cities53 µg/m³peak, Cork
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
Use this board
SmogRank, most polluted cities in Leinster, Ireland, PM2.5, last 30 days to 6 Oct 2026, 22:00 UTC, smogrank.com/ie/region/leinster?w=30d.
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.
Updated 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.