CAQM invokes 5-point action plan as per Stage-IV of Extent GRAP in Entire Delhi-NCR, with immediate effect

• GRAP = emergency tiered response mechanism for air pollution in Delhi-NCR, operationalised by the Commission for Air Quality Management (CAQM).
• On 17 Jan 2026, CAQM's Sub-Committee invoked Stage-IV ("Severe+") restrictions across the entire Delhi-NCR after Delhi's daily-average AQI hit 400 at 4 PM and rose to 428 by 8 PM, driven by a Western Disturbance, calm winds and adverse meteorology.
• Stage-IV is the most stringent tier and typically imposes a 5-point action plan (truck entry ban, construction halts, school closure options, vehicle curbs, WFH advisories) on top of Stages I–III already in force.
• High-yield for GS-III (environment/pollution) and Prelims (statutory bodies, AQI bands, GRAP thresholds).