Delhi Air: Target 2040 or Costly Delays?

A recent analysis of Delhi's air quality over 36 years reveals that the city's annual average PM2.5 concentrations have remained around 100 µg/m³. This figure is 2.5 times the national standard and significantly higher than the World Health Organization's guidelines. The study attributes this persistent pollution to implementation delays in existing clean air action plans, rather than a deficit in scientific understanding or policy.

Researchers have quantified the severe consequences of these delays, detailing both financial and health risks. If Delhi's air quality only improves to 60 µg/m³ by 2040 instead of the target 40 µg/m³, the population will experience 11.6% more exposure-related health issues. Critically, if concentrations remain at 100 µg/m³, mortality cases could rise by 35.3% compared to achieving the 40 µg/m³ target.

The study also points to the potential for rapid improvement, citing the significant reduction in pollution observed during the COVID-19 lockdown. By implementing drastic reductions in emissions from anthropogenic sources, heating, and stubble burning, Delhi could achieve its national ambient standard of 40 µg/m³. The research suggests that timely execution of the National Clean Air Programme's plan could have already put the city on track to meet this target by 2040.