Average dust concentrations on the platform for the three stations (three days)
| Station | Location | PM2.5 (μg/m3) Mean (SD) | PNC (particles/cm3) Mean (SD) |
|---|---|---|---|
| Holland Park Station | Central Line | 300 (0) | 29000 (6700) |
| Hampstead Station | Northern Line | 480 (26) | 14000 (2500) |
| Oxford Circus Station | Victoria Line | 270 (21) | 24000 (4500) |