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Delhi Air: Secondary Aerosols Dominate Pollution
11 Nov
Summary
- Secondary organic aerosols were the largest pollution source on Wednesday.
- Firecracker pollution contribution dropped significantly after Diwali.
- Delhi's AQI reached 'very poor' levels, indicating severe air quality.
On Wednesday, secondary organic aerosols were identified as the leading contributor to Delhi's air pollution, accounting for 22.7% of the pollution load. Domestic solid biofuel burning was the next largest source, contributing 22.3%, according to estimates from the Indian Institute of Tropical Meteorology.
Vehicular emissions represented 19.3% of the pollution, with secondary inorganic aerosols at 11.9%. The contribution of firecrackers, a major source during Diwali, dramatically decreased to 7.4% on Wednesday. Mixed combustion accounted for 10.6% of the pollution.
The city's 24-hour Air Quality Index (AQI) worsened to 313 on Wednesday, placing it in the 'very poor' category. This followed a marginal improvement to 'poor' on Tuesday. Weather stations recorded a slight decrease in minimum temperatures and an increase in maximum temperatures.
