Air Quality Disparities Across Northern India

The air people breathe in India remains heavily dependent on geography, with official data indicating that northern urban centers continue to experience significantly poorer air quality compared to southern regions. Monitoring records from the Central Pollution Control Board (CPCB) show a persistent pollution cluster spreading across the Indo-Gangetic Plain.

In the national capital, air quality varies markedly across different monitoring stations. While certain zones record relatively moderate numbers, other pockets report severely elevated particulate matter levels, highlighting how exposure to toxic air differs even within the same metropolitan boundary.

Dissecting Delhi’s Pollution Sources

According to findings from the Decision Support System for Air Quality Management in Delhi—operated under the Ministry of Earth Sciences—the capital's toxic air is the product of multiple compounding sources rather than a single factor.

Data highlights regional transport as a major driver. Pollution carried into the capital from the broader National Capital Region (NCR) accounted for the largest single share, contributing 37 percent of Delhi's PM2.5 load. Meanwhile, vehicular and localized transport emissions contributed 20.8 percent, and various other urban sources added 13.3 percent.

Stubble burning has also emerged as a critical seasonal pressure. Accounting for 10.9 percent of the pollution mix during late October, agricultural fires have steadily escalated their footprint as the harvesting cycle peaks.

The Trajectory of Stubble Burning

While agricultural residue burning is not the year-round primary source of the city's pollution, its contribution follows a sharp upward curve coinciding with the onset of winter. Data indicates that the share of stubble smoke remained low through September and early October, but began climbing steadily as farm fires intensified in neighboring agricultural belts.

Satellite-backed tracking from the Consortium for Research on Agroecosystem Monitoring and Modelling from Space and the Indian Agricultural Research Institute (IARI) maps the geographical origin of these incidents. Recorded farm fires since mid-September show dense clusters across northern and central states. Punjab leads the tally with 581 recorded incidents, followed by Madhya Pradesh with 468, Rajasthan with 438, Uttar Pradesh with 286, and Uttarakhand with 141 incidents rounding out the top five.

As these spatial clusters expand, environmental authorities remain on high alert, emphasizing that coordinated regional intervention will be essential to mitigate the compounding effects of crop residue burning and winter meteorological conditions.