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The real-time data as collected from the field instruments is displayed live on these portals without human intervention at CPCB. It is likely that the live data may display some errors or abnormal values. Any abnormal value may be due to any episode or instrumental error at any particular time. Short duration value of any parameter should not be compared with permissible limit, i.e. 24 hour average or annual average as per National Ambient Air Quality Standard (NAAQS), 2009.Before reporting the data anywhere, validated data should be obtained from CPCB/SPCB offices