Crap Towns / Horley / Air quality
How dirty is the air in Horley?
People in Horley breathed an average of 11.4 micrograms of nitrogen dioxide per cubic metre in 2024, 41% higher than the typical town's 8.1, and 7.2 of fine particles (PM2.5), 7% higher than the typical town's 6.7. Both are over the World Health Organization's guidelines of 10 and 5.
| Pollutant | Here | Typical town | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 11.4 | 8.1 | 10 |
| Fine particles (PM2.5) | 7.2 | 6.7 | 5 |
| Town | Distance | Nitrogen dioxide, µg/m³ |
|---|---|---|
| South Merstham | 9.4 km | 11.8 |
| Horley | – | 11.4 |
| Redhill | 6.3 km | 10.2 |
| Caterham | 13.5 km | 9.9 |
| Crawley | 6.6 km | 9.8 |
| Reigate | 7.7 km | 9.5 |
| Dorking | 13.3 km | 8.9 |
| Oxted | 13.7 km | 8.8 |
| East Grinstead | 11.6 km | 7.6 |
| Crawley Down | 8.3 km | 7.3 |
| Edenbridge | 15.9 km | 6.8 |
| The typical town | – | 8.1 |