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Air Quality, Ambient Standards (TCVN 5937, 1995)

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AIR QUALITY:
AMBIENT AIR QUALITY STANDARDS
TCVN 5937-1995
1.    Scope

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)
Nș 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.
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Acknowledgement: Text courtesy of NEA Policy Division, MOSTE.

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Updated as at 06-Oct-2006