| 23-4 Air Quality by Area Type and Roadside Condition (2001) | ||||
| (Microgram/cu.m.) | ||||
| Area Type and | Annual average air pollutant concentrations | |||
| Roadside | Total | Respirable | ||
| Sulphur | Nitrogen | Suspended | Suspended | |
| Dioxide | Dioxide | Particulates | Particulates | |
| Urban | 18 | 64 | 74 | 53 |
| New Town | 16 | 52 | 75 | 51 |
| Rural | 10 | 11 | 43 | |
| Roadside | 19 | 99 | 120 | 80 |