Crap Towns / Mountain Ash / Air quality
How dirty is the air in Mountain Ash?
People in Mountain Ash breathed an average of 5.8 micrograms of nitrogen dioxide per cubic metre in 2024, 28% lower than the typical town's 8.1, and 5.2 of fine particles (PM2.5), 22% lower than the typical town's 6.7. The fine particles are over the World Health Organization's guideline of 5; the nitrogen dioxide is within its 10.
| Pollutant | Here | Typical town | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 5.8 | 8.1 | 10 |
| Fine particles (PM2.5) | 5.2 | 6.7 | 5 |
| Town | Distance | Nitrogen dioxide, µg/m³ |
|---|---|---|
| Pontypridd | 9.6 km | 8.0 |
| Porth | 8.1 km | 6.7 |
| Tonypandy | 8.4 km | 6.6 |
| Treharris | 6.1 km | 6.4 |
| Abercynon | 5.7 km | 6.4 |
| Bargod | 10.6 km | 6.1 |
| Rhondda | 7.5 km | 5.8 |
| Mountain Ash | – | 5.8 |
| Treorchy | 9.0 km | 5.4 |
| Merthyr Tydfil | 7.7 km | 5.2 |
| Aberdare | 4.7 km | 4.9 |
| The typical town | – | 8.1 |