Delhi breathes easier after one month as air quality sees slight improvement: What’s behind change?

New Delhi: Air Quality Index drops to 273 on Monday, continuing relief after 32 days of 'very poor' and 'severe' levels; authorities maintain stringent anti-pollution measures.

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Delhi AQI turns poor (ANI (File))

New Delhi: Delhi’s air quality showed slight improvement for the second consecutive day on Monday, though it remained in the 'poor' category with an Air Quality Index (AQI) of 273 in the morning. The Central Pollution Control Board (CPCB) reported that Delhi's AQI was 285 on Sunday, reflecting a shift from the previous 32 days of 'very poor' and 'severe' air quality (AQI above 400). The last time the city experienced 'poor' air quality was on October 29, with an AQI of 268.

Reasons For Air Quality Improvement 

Experts attribute the improvement to dry northwesterly winds and ample sunlight, which have helped disperse pollutants. However, the air quality remains concerning, as an AQI between 201 and 300 is considered 'harmful' to sensitive groups. The AQI is divided into six categories: 'good'(0-50), 'satisfactory'(51-100), 'moderate'(101-200), 'poor'(201-300), 'very poor'(301-400), and 'severe'(401-500). 

Graded Response Action Plan in Effect

Delhi is currently under Stage 4 of the Graded Response Action Plan (GRAP), as per the Commission for Air Quality Management (CAQM). On November 29, the Supreme Court instructed authorities to maintain stringent anti-pollution measures until at least Monday. Stage 4 of GRAP, implemented on November 18, aims to curb pollution levels.

Weather Conditions: A Slight Warm-up

In terms of weather, the India Meteorological Department (IMD) recorded a minimum temperature of 10.4°C, which is 0.9°C above the seasonal average. The maximum temperature is expected to reach around 27°C, and the humidity was reported at 89% at 8:30 am. Despite the improvement in air quality, concerns about pollution and its effects on health persist.