SmogRank / World / Europe / United Kingdom / Northern Ireland
Most polluted cities in Northern Ireland, United Kingdom
No city in Northern Ireland, United Kingdom has enough readings to rank so far this year.
A city joins this ranking with enough days of readings so far this year; none here has that right now, so there is nothing to map or chart.
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
Northern Ireland 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 |
|---|---|
| Belfast | ≈ 5 µg/m³ |
| Derry | ≈ 4 µg/m³ |
| Lisburn | ≈ 5 µg/m³ |
| Newtownabbey | ≈ 4 µg/m³ |
| Bangor | ≈ 5 µg/m³ |
| Craigavon | ≈ 4 µg/m³ |
| Castlereagh | ≈ 5 µg/m³ |
| Portadown | ≈ 4 µg/m³ |
| Newtownards | ≈ 6 µg/m³ |
| Carrickfergus | ≈ 4 µg/m³ |
| Ballymena | ≈ 4 µg/m³ |
| Newry | ≈ 4 µg/m³ |
| Coleraine | ≈ 5 µg/m³ |
| Omagh | ≈ 4 µg/m³ |
| Antrim | ≈ 4 µg/m³ |
| Larne | ≈ 4 µg/m³ |
| Banbridge | ≈ 4 µg/m³ |
Updated 2026-10-07 00:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.