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Smog at 449 in one Delhi colony, and Diwali still five days away

Delhi's average AQI rose to 331 at 7 am on Tuesday, up from 307 a day earlier, with eight of 58 monitoring stations crossing 400. Jahangirpuri recorded 449 and Rohini 429. The Commission for Air Quality Management invoked GRAP Stage 2 across Delhi-NCR on Monday as stubble burning's share of PM2.5 was forecast to climb to 22 per cent by Thursday.