Crap Towns / Holyhead / Air quality
How dirty is the air in Holyhead?
People in Holyhead breathed an average of 3.2 micrograms of nitrogen dioxide per cubic metre in 2024, 60% lower than the typical town's 8.1, and 4.3 of fine particles (PM2.5), 36% lower than the typical town's 6.7. Both are within the World Health Organization's guidelines of 10 and 5.
| Pollutant | Here | Typical town | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 3.2 | 8.1 | 10 |
| Fine particles (PM2.5) | 4.3 | 6.7 | 5 |
| Town | Distance | Nitrogen dioxide, µg/m³ |
|---|---|---|
| Bangor | 34.1 km | 4.5 |
| Colwyn Bay | 59.2 km | 4.1 |
| Abergele | 69.6 km | 4.0 |
| Rhyl | 76.8 km | 4.0 |
| Caernarfon | 30.9 km | 3.5 |
| Prestatyn | 81.3 km | 3.4 |
| Conwy | 53.7 km | 3.4 |
| Kinmel Bay | 73.9 km | 3.4 |
| Llandudno | 53.4 km | 3.4 |
| Holyhead | – | 3.2 |
| Llangefni | 22.4 km | 2.6 |
| The typical town | – | 8.1 |