Table 3.2a - Hong Kong
Air Quality Objectives (µgm-3) (a)
Pollutant |
Averaging Time |
||||
|
1 Hours (b) |
8 Hours (c) |
24 Hours (c) |
3 Months (d) |
1 Year (d) |
Total Suspended
Particulates (TSP) |
- |
- |
260 |
- |
80 |
Respirable Suspended
Particulates (e) (RSP) |
- |
- |
180 |
- |
55 |
Sulphur Dioxide (SO2) |
800 |
- |
350 |
- |
80 |
Nitrogen Dioxide (NO2) |
300 |
- |
150 |
- |
80 |
Carbon Monoxide (CO) |
30,000 |
10,000 |
- |
- |
- |
Lead |
- |
- |
- |
1.5 |
- |
Ozone (O3)
(f) |
240 |
- |
- |
- |
- |
Note: (a) Measured
at 298K (25°C)
and 101.325 kPa (one atmosphere) (b) Not
to be exceeded more than three times per year (c) Not
to be exceeded more than once per year (d) Arithmetic
means (e) Respirable
suspended particulates are defined as particles suspended in the air with a
nominal aerodynamic diameter of 10 mm
and smaller (f) Photochemical
oxidants are determined by measurement of ozone only |