<p>Delhi's air quality deteriorated to the 'very poor' category on Friday, after marginal improvement over the last few days, with a layer of smog shrouding several parts of the city.</p>.<p>The city recorded a minimum temperature of 14.6 degrees Celsius, a notch above normal, according to the India Meteorological Department (IMD).</p>.<p>The national capital's overall Air Quality Index (AQI) stood at 331 at 9 am, Central Pollution Control Board (CPCB) data showed.</p>.<p>An AQI between zero and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor', and 401 and 500 'severe'.</p>.<p><strong>Read | <a href="https://www.deccanherald.com/national/drones-ai-to-fight-pollution-caqm-approves-7-projects-1161296.html" target="_blank">Drones, AI to fight pollution: CAQM approves 7 projects</a></strong></p>.<p>The relative humidity was 79 per cent at 8:30 pm, the IMD said.</p>.<p>The weather department has forecast mainly clear skies during the day. The maximum temperature is expected to settle at 29 degrees Celsius.</p>.<p>The Delhi government had on Monday decided to reopen primary classes from November 9 and revoke the order asking 50 per cent of its staff to work from home in view of an "improvement" in the city's air quality over the last few days.</p>.<p>The Commission for Air Quality Management had said on Thursday that it will review the air pollution situation in Delhi on Friday.</p>
<p>Delhi's air quality deteriorated to the 'very poor' category on Friday, after marginal improvement over the last few days, with a layer of smog shrouding several parts of the city.</p>.<p>The city recorded a minimum temperature of 14.6 degrees Celsius, a notch above normal, according to the India Meteorological Department (IMD).</p>.<p>The national capital's overall Air Quality Index (AQI) stood at 331 at 9 am, Central Pollution Control Board (CPCB) data showed.</p>.<p>An AQI between zero and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor', and 401 and 500 'severe'.</p>.<p><strong>Read | <a href="https://www.deccanherald.com/national/drones-ai-to-fight-pollution-caqm-approves-7-projects-1161296.html" target="_blank">Drones, AI to fight pollution: CAQM approves 7 projects</a></strong></p>.<p>The relative humidity was 79 per cent at 8:30 pm, the IMD said.</p>.<p>The weather department has forecast mainly clear skies during the day. The maximum temperature is expected to settle at 29 degrees Celsius.</p>.<p>The Delhi government had on Monday decided to reopen primary classes from November 9 and revoke the order asking 50 per cent of its staff to work from home in view of an "improvement" in the city's air quality over the last few days.</p>.<p>The Commission for Air Quality Management had said on Thursday that it will review the air pollution situation in Delhi on Friday.</p>