The New Indian Express. Delhi’s air quality deteriorated to hazardous levels on Friday morning, with the overall Air Quality Index (AQI) touching 494 at 7.31 am. Dense fog and pollution enveloped the national. Speaking to ANI, Saurabh Bharadwaj, citing a CREA report, alleged data manipulation in Delhi pollution levels, claiming that the actual figures were 49 per cent higher than what.