Overview
- Delhi’s 24‑hour average AQI rose to 189 on Monday, still in the moderate band yet just 11 points below the poor category, with official forecasts indicating a shift to poor from October 15 for several days.
- Measured PM2.5 in Delhi reached about 103 micrograms per cubic metre on Monday, far above the World Health Organization’s 24‑hour guideline of 15.
- Source estimates show transport as the largest local contributor to Delhi’s PM2.5 at roughly 19.8%, while stubble burning’s share was about 0.8% on Sunday with satellite detections reported in Punjab, Haryana and the UP‑NCR region.
- Mumbai’s air quality has moved deeper into the moderate range citywide, with hotspots already poor such as Deonar (around 225–253 AQI) and Kalamboli at 201, even as the city average hovered near 135–153.
- Authorities have activated winter mitigation measures: Mumbai’s civic body plans deep cleaning, misting and new multi‑purpose cleaning machines, while Delhi officials report stepped‑up sweeping, dust control and enforcement and note 199 sub‑200 AQI days so far this year.