Delhi Launches Major Study to Uncover Decade-Long Air Pollution Shifts

Delhi-NCR has just kicked off a major year-long study to deeply understand how its notoriously toxic air has changed over the past decade and what causes it today. This isn't just another report; it's a high-tech effort using AI and satellite data to create detailed pollution maps, aiming to pinpoint exactly where harmful pollutants like PM2.5 and NOx are coming from across Delhi and 27 nearby districts. The project is crucial because earlier studies from 2016 are now quite old, and many things have changed since then, like vehicle technologies and fuel rules. This new 'source apportionment study' is a big deal because previous efforts to clean Delhi's air, including strict rules like the Graded Response Action Plan (GRAP) and the new Winter Action Plan 2026-27, haven't shown lasting improvement. In fact, Delhi's air quality regularly drops to 'poor' or 'very poor' levels, with some areas hitting 'severe' just yesterday. Experts believe that knowing the exact sources of pollution – from vehicles to industries, road dust, and stubble burning – is the only way to make truly effective plans. Recent data from October 26 showed vehicles were a major cause, contributing to 25% of PM2.5 pollution. The study, funded by the Central Pollution Control Board (CPCB) and guided by the Commission for Air Quality Management (CAQM), will run throughout 2026, with results expected by mid-2027. It will not only give a clear picture of today's pollution but also predict what Delhi's air might look like in 2030, 2035, and 2040 under different cleanup plans. With six new real-time monitoring super-sites also being set up, this effort aims to give policymakers the solid scientific facts they need to finally help millions breathe easier.