Overview
- Citywide air quality measured around 390–392 on Sunday morning, with CPCB data showing 19–20 of 39 active stations in the ‘severe’ range, including Anand Vihar (~445), Shadipur (~443) and Wazirpur (~443).
- IMD flagged dense fog and weak winds that limit dispersion, with forecasts indicating air quality will stay in the ‘very poor’ bracket for the next several days.
- The Delhi government announced two GRAP‑4 curbs as permanent policies: refusal of fuel to vehicles without a valid PUC certificate and restrictions on entry of vehicles that do not meet BS6 standards.
- Reporting on the in‑force GRAP stage diverged, with several outlets citing Stage III restrictions on construction and industry, others stating Stage IV, while some coverage noted no change beyond Stages I–III after last week’s rollback of Stage 4.
- IITM’s Decision Support System attributed the largest share of Delhi’s PM2.5 to vehicular emissions (~16%), with notable external contributions from nearby NCR districts such as Jhajjar.