Crap Towns / Harpenden / Air quality
How dirty is the air in Harpenden?
People in Harpenden breathed an average of 9.4 micrograms of nitrogen dioxide per cubic metre in 2024, 16% higher than the typical town's 8.1, and 7.3 of fine particles (PM2.5), 9% higher 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) | 9.4 | 8.1 | 10 |
| Fine particles (PM2.5) | 7.3 | 6.7 | 5 |
| Town | Distance | Nitrogen dioxide, µg/m³ |
|---|---|---|
| Hatfield | 9.8 km | 11.8 |
| Luton | 10.3 km | 11.8 |
| London Colney | 11.4 km | 11.1 |
| Chiswell Green | 10.4 km | 10.8 |
| Abbots Langley and Kings Langley | 13.4 km | 10.7 |
| Redbourn | 3.9 km | 10.5 |
| St Albans | 7.1 km | 10.5 |
| Radlett | 14.7 km | 10.3 |
| Welwyn Garden City | 10.8 km | 10.2 |
| Hemel Hempstead | 10.7 km | 9.9 |
| Harpenden | – | 9.4 |
| The typical town | – | 8.1 |