Delhi witnessed a thick blanket of haze in many areas as air quality in the region continued to deteriorate further on Monday.  The overall Air Quality Index (AQI) being hovered at 322, slipping into the "very poor" category, according to System of Air Quality and Weather Forecasting and Research. Parts of the city reported Air Quality Index between the 'very poor' and 'severe' range.

According to the Air Quality Management, an Air Quality index between 0-50 is marked good, 51-100 is satisfactory, 101- 200 is moderate, 201- 300 is poor, 301-400 is very poor and 401-500 is considered severe. Earlier, Delhi Environment Minister Gopal Rai urged the Commission for Air Quality Management (CAQM) to make the bio-decomposer technology mandatory for all states, stating pollution levels in the national capital shoot up with an increase in stubble burning.

The Delhi government, along with PUSA, developed a bio-composer which Delhi Chief Minister Arvind Kejriwal had earlier claimed could decompose 70 to 95 percent of crop residue. The government claimed that stubble burning in Punjab, Haryana, Uttar Pradesh and Rajasthan have significantly contributed to the hazardous levels of air pollution in the national capital. During a COVID-19 review meeting, Kejriwal sought Prime Minister Narendra Modi's intervention to get rid of pollution due to stubble burning, while citing pollution as an important factor behind the surge of coronavirus cases in the national capital.

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