Air Quality, Ambient Standards (TCVN 5937, 1995)
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1. ScopeAIR QUALITY:
AMBIENT AIR QUALITY STANDARDS
TCVN 5937-1995
1.1 This standard specifies concentration limits of main constituents in ambient air (carbon monoxide nitrogen dioxide, ozone, sulfur dioxide, Lead particulate, suspended particles).
1.2 This standard applied to evaluation of ambient air quality and to monitoring of air pollution status.
2. Limitation Values
The limits of main parameters in ambient air are shown in the table 1.
Table 1
Ambient Air Quality Standards (mg/m3)
| Nº | Parameter | 1 hr-Averaging Time | 8 hr-Averaging Time | 24 hr-Averaging Time |
| 1 | CO | 40 | 10 | 5 |
| 2 | NO2 | 0,4 | - | 0,1 |
| 3 | SO2 | 0,5 | - | 0,3 |
| 4 | Lead (particulate) | - | - | 0,005 |
| 5 | O3 | 0,2 | - | 0,06 |
| 6 | Suspended particulate matter | 0,3 | - | 0,2 |
Note: Standard methods of analysis of ambient air quality parameters are specified in available current TCVNs.Top of Page
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