 |
| |
| Parameter |
Unit |
8-hour average |
| Excellent Class |
Good Class |
Room Temperature
|
℃ |
20 to 25.5 |
25.5 |
| Relative Humldlty |
% |
40 to 70 |
<70 |
Air movement
|
m/s |
<0.2 |
<0.3 |
| Carbon Dioxide(CO₂) |
ppmv |
<800 |
<1,000 |
| Carbon Monoxide(CO) |
.g/m³ |
<2,000 |
<10,000 |
| Respirable Suspended Particulates(PM10) |
.g/m³ |
<20 |
<180 |
| Nitrogen Dioxide(NO₂) |
.g/m³ |
<40 |
<150 |
| Ozone(O₂) |
.g/m³ |
<60 |
<120 |
Formaldhyde(HCHO)
|
.g/m³ |
<30 |
<100 |
| Total Volatile Organic Compounds(PVOC) |
.g/m³ |
<200 |
<600 |
Radon(Rn)
|
.bq/m³ |
<150 |
<200 |
| Airbome Bacteria |
.cfu/m³ |
<500 |
<1,000 |
| |
Note: Data from the HKIAQ information centre |
|
|
