Delhi AQI nears ‘severe’ range, GRAP IV returns, Pg5

Key Highlights:

• Delhi's AQI reached 400 on Saturday, triggering GRAP IV.
• GRAP IV measures include hybrid schooling for classes up to XI and 50% work-from-home for offices.
• Truck entry into Delhi is restricted to essential commodities, services, and specific fuel types.
• Construction and demolition activities are halted under GRAP IV.
• IITM forecasts 'Severe' air quality on Sunday, improving slightly to 'Very Poor' in coming days.

Detailed Insights:

• The Commission for Air Quality Management (CAQM) invoked GRAP III measures on Friday following an AQI of 354.
• Neighboring cities like Noida and Gurgaon also experienced a rise in AQI, reaching 388 and 360 respectively.
• GRAP IV restrictions apply to Delhi and NCR districts including Gurgaon, Faridabad, Ghaziabad, and Gautam Buddha Nagar.
• Permitted trucks include electric, CNG, LNG, and BS-VI diesel vehicles, while older diesel vehicles face restrictions.
• The Air Quality Index (AQI) is expected to remain in the 'Severe' category, indicating significant health risks.

Key Concepts Involved:

• AQI (Air Quality Index): A measure of air pollution levels, with higher values indicating poorer air quality.
• GRAP (Graded Response Action Plan): A set of emergency measures implemented based on air quality to reduce pollution.
• BS-VI (Bharat Stage VI): Emission standards for vehicles in India, aimed at reducing air pollutant emissions.