SmogRank / World / Ireland / Leinster / February 2026

Most polluted cities in Leinster, Ireland, February 2026

10 cities in Leinster, Ireland ranked by their average PM2.5 over the 28 days. Worst: Wexford at 11.3 µg/m³, #1,133 of 2,841 cities in the world. Cleanest: Greystones at 6.7. A city needs measurements on 70% of the days to be ranked.

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.

← Wexford 4% 3%0
Every city in Leinster, Ireland ranked for February 2026, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Wexford
    4%
  2. 2Athlone
    0%
  3. 3Enniscorthy
    0%
  4. 4Longford
    0%
  5. 5Leixlip
    0%
  6. 6Drogheda
    0%
  7. 7Dublin
    0%
  8. 8Carlow
    0%
  9. 9Naas
    0%
  10. 10Greystones
    0%
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

All cities in the world, February 2026 · All cities in Ireland, February 2026 · Leinster now

Use this board

SmogRank, most polluted cities in Leinster, Ireland, PM2.5, February 2026, smogrank.com/ie/region/leinster/history/2026-02 (accessed 6 Oct 2026).

Download top 10 (PNG)

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.