Data from pump based monitoring on station platforms (three days)
| Station | Location | PM2.5 (μg/m3) Mean (SD) | Respirable (μg/m3) Mean (SD) | PM10 (μg/m3) Mean (SD) |
|---|---|---|---|---|
| *Two PM10 measurements excluded because of errors in sampling/analysis. | ||||
| Holland Park | Central Line | 310 (17) | 790 (37) | 1000 (160) |
| Hampstead | Northern Line | 420 (14) | 1400 (47) | 1500 (120) |
| Oxford Circus* | Victoria Line | 300 (18) | 920 (63) | 1100 (33) |