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Delhi's Winter Air Worst in 3 Years, CSE Analysis Shows
11 Nov
Summary
- Delhi-NCR air pollution worsened significantly in early winter.
- PM2.5 levels were highest in three years in the week before Diwali.
- Vehicle emissions identified as the primary local pollution source.
Air quality in Delhi-NCR deteriorated significantly during the early winter months of 2026, according to a new analysis by the Centre for Science and Environment (CSE).
In the week preceding Diwali, PM2.5 levels reached 236 micrograms per cubic meter, the highest recorded in three years. This figure represents a substantial increase compared to previous years, indicating a higher baseline pollution level.
The CSE's assessment identified transport as the principal local source of pollution. Vehicular emissions are considered the main reason for daily exposure to toxic air. Despite year-round emission control measures, their effectiveness has been insufficient.
Measures such as emergency restrictions on pre-BS-VI vehicles have not alleviated traffic congestion. Furthermore, an increase in smoke from stubble burning has contributed to the severe pollution, even when farm fire incidents declined.
