From hazardous to harmful: Delhi's AQI drops slightly after 32 days of severe pollution

New Delhi: Delhi’s air quality showed a slight improvement for the second consecutive day on Monday, moving from the 'severe' category to 'poor.' The Air Quality Index (AQI) stood at 273 in the morning, down from 285 on Sunday, marking a positive shift after over a month of 'very poor' and 'severe' air quality (AQI above 400). The last time Delhi experienced 'poor' air quality was on October 29, when the AQI was 268.

Factors Behind the Improvement

Experts attribute this improvement to dry northwesterly winds and ample sunlight, which have helped disperse pollutants. However, an AQI between 201 and 300 is still classified as 'harmful' for sensitive groups, indicating that while the air quality has improved, it remains a concern for public health. The AQI is categorized into six levels: 'good' (0-50), 'satisfactory' (51-100), 'moderate' (101-200), 'poor' (201-300), 'very poor' (301-400), and 'severe' (401-500).

Stage 4 of Graded Response Action Plan in Effect

Delhi is currently under Stage 4 of the Graded Response Action Plan (GRAP), as set by the Commission for Air Quality Management (CAQM). The Supreme Court had instructed authorities to continue implementing strict anti-pollution measures, which has contributed to the improved air quality. Stage 4 of GRAP, which was initiated on November 18, aims to reduce pollution levels through a series of stringent actions.

Weather Conditions in Delhi

The weather also played a role in the improved air quality. The India Meteorological Department (IMD) recorded a minimum temperature of 10.4°C, 0.9°C above the seasonal average. The maximum temperature for the day is expected to reach 27°C, with humidity levels reported at 89% in the morning. While the air quality has improved, pollution remains a significant health concern for Delhi residents.

Continued Air Pollution Risks

Despite the slight improvement, the air quality remains harmful, especially for individuals with respiratory issues. The authorities and residents alike continue to grapple with air pollution, which poses significant health risks. The ongoing measures under GRAP will likely continue to play a crucial role in managing Delhi's air quality in the coming days.