Daily average pollutant concentrations for air monitoring stations in Sydney, 1 April 1997–31 December 2000
| Australian National Standard | Mean (SD) | Minimum | 25th centile | Median | 75th centile | Maximum | |
|---|---|---|---|---|---|---|---|
| *Advisory reporting standard from 2003. | |||||||
| ppb, parts per billion (10−9); ppm, parts per million (10−6); CO, carbon monoxide, 8 hour average in ppm; O3, ozone, 1 hour max in ppb; PM10, particulate matter less than 10 microns, 24 hour average in μg/m3; PM2.5, particulate matter less than 2.5 microns, 24 hour average in μg/m3; NO2, nitrogen dioxide, 24 hour average in ppb. | |||||||
| Pollutant | |||||||
| PM10 (μg/m3) | |||||||
| 24 hour av | 50 μg/m3 | 16.8 (7.1) | 3.8 | 12.3 | 15.7 | 19.9 | 104.0 |
| PM2.5 (μg/m3) | |||||||
| 24 hour av | 25 μg/m3* | 9.4 (5.1) | 2.4 | 6.5 | 8.4 | 11. 2 | 82.1 |
| CO (ppm) | |||||||
| 8 hour av | 9.0 ppm | 0.8 (0.7) | 0.0 | 0.4 | 0.6 | 1.1 | 4.6 |
| O3 (ppb) | |||||||
| 1 hour max | 100 ppb | 31.6 (14.6) | 3.2 | 22.7 | 27.7 | 36.3 | 126.7 |
| NO2 (ppb) | |||||||
| 1 hour max | 120 ppb | 23.2 (7.4) | 56.2 | 18.0 | 23.0 | 27.5 | 59.4 |