Pollution Levels Reach Nine-Month High Across Capital Region
The overall air quality in Delhi deteriorated to the very poor category on Monday, November 2, 2026, reaching an Air Quality Index (AQI) of 324 by 4 p.m., according to Central Pollution Control Board (CPCB) data. The reading rose from 261 in the poor category on Sunday, November 1, and 117 in the moderate category on Saturday, October 31. The Times of India reported that the AQI of 324 was the highest level recorded in nine months, since February 4 when the index stood at 339. The daily bulletin released by the CPCB at 4 p.m. is treated as the day’s AQI, following Friday, October 30, when an AQI of 60 gave the capital its cleanest October day in four years after heavy rain washed away pollutants.
The deterioration extended across several municipal areas and neighboring towns in northern India, including Noida, Kaithal, and Hapur. On Monday morning at 8 a.m., CPCB data indicated a 24-hour average AQI of 310, which later rose to 324 by the afternoon bulletin. Monitoring equipment maintained across the capital recorded widespread pollution spikes. Out of 59 air quality monitoring stations in Delhi, data was available for 58 on Monday. Of these active reporting sites, 37 recorded "very poor" air quality, 17 were in the "poor" category, and one recorded "moderate" air quality.
Specific monitoring stations in the city recorded levels entering the severe category. At 4 p.m., Jahangirpuri recorded the worst AQI in the city at 436, according to monitoring data. Rohini recorded an AQI of 415 and Punjabi Bagh logged 413, placing three stations in the severe classification. Fine particulate matter measuring 2.5 micrometres or less, known as PM2.5, remained the dominant pollutant across the capital. These particles can penetrate deep into the lungs and enter the bloodstream.
Meteorological Factors and Sectoral Emission Contributions
The seasonal surge in air pollution across Delhi-NCR and the broader Indo-Gangetic Plains occurs every winter due to specific meteorological conditions, including reduced wind speeds and falling temperatures. Atmospheric conditions in late autumn trap local and regional emissions near the ground. Meteorologist Navdeep Dahiya stated in a post on X that the regional smog season had commenced, noting that wind flow from the northwest combined with calm atmospheric conditions would cause existing emissions to persist in the air for longer durations. Dahiya added that no favorable weather conditions were expected over the following seven to 10 days, warning of worsening smog across Delhi-NCR and the northern plains.
Official modeling provided by the Decision Support System for Delhi detailed the proportional contributions of various sectors to the capital's total pollution load on Monday. The local transport sector accounted for the largest identified share at 19.2 percent. Residential activities contributed 4.9 percent, while industrial activities within Delhi and its peripheral areas accounted for 4.2 percent. Agricultural stubble burning in nearby regions contributed 8.4 percent to the city's pollution load, while unclassified sources made up the remaining 20.7 percent.
Contributions from surrounding districts in the National Capital Region (NCR) were also estimated by the Decision Support System for Delhi. Jhajjar district accounted for 6.9 percent of Delhi's pollution, followed by Sonipat at 5.1 percent, Gurgaon at 2.9 percent, Rohtak at 2.7 percent, Ghaziabad at 2.6 percent, and Baghpat at 2.4 percent. Panipat and Bhiwani contributed 2 percent each, while Gautam Buddha Nagar accounted for 1.9 percent of the pollution on Monday.
forecasts issued by official bodies indicate prolonged exposure to poor air quality over the coming week. The Central government’s Air Quality Early Warning System for Delhi projected that air quality would remain in the "poor" to "very poor" category for five to six days. Specific forecasts from the warning system expect the AQI to stay in the "very poor" category from November 3 to November 5, before experiencing a marginal improvement to the "poor" category over the subsequent six days.
Invocation of GRAP Stage II Emergency Measures
In response to rising pollution levels, the Commission for Air Quality Management (CAQM) formally invoked Stage II of the Graded Response Action Plan (GRAP) across the entire National Capital Region with immediate effect on Monday afternoon. The decision was formalized in an order issued by the GRAP sub-committee following a review of current air monitoring data alongside meteorological forecasts provided by the India Meteorological Department (IMD) and the Indian Institute of Tropical Meteorology (IITM). Stage II emergency measures are automatically triggered when the regional AQI falls between 301 and 400 to prevent further environmental degradation.
Under Stage II GRAP regulations, regional administrative authorities are mandated to execute specific anti-pollution operations. Municipal agency officials must ensure the systematic collection and disposal of solid waste and construction debris while taking strict action against open waste burning. Traffic police departments are directed to deploy personnel at congested intersections and busy roadways to maintain traffic flow and reduce idling emissions.
Under the Stage 2 pollution-control measures, industries, brick kilns and power plants will face stricter inspections to ensure they follow pollution-control rules and use approved fuels. Officials will intensify checks for valid Pollution Under Control (PUC) certificates, take action against visibly polluting vehicles, and strictly enforce rules on older diesel and petrol vehicles. Offices have also been encouraged to arrange shared transport for employees.
The CAQM issued official guidance advising citizens across the NCR to prioritize public transportation or carpooling, maintain their vehicles, switch off engines at traffic signals, and ensure up-to-date PUC documentation. Residents were further requested to avoid burning domestic waste, limit reliance on diesel generators, and refrain from bursting firecrackers.
Earlier seasonal regulations, effective from November 1, instituted broader winter pollution controls across Delhi. These measures include halts on construction activities, a mandatory 50 percent work-from-home mandate for both public and private sector offices, a doubling of municipal parking fees to discourage private vehicle usage, and restrictions on non-Delhi-registered vehicles operating below BS-VI emission standards. However, initial enforcement of the vehicle bans was reported as likely to remain lenient until the Deepavali festival period.
Border Enforcement Operations and Interstate Traffic Snarls
The implementation of border restrictions targeting non-compliant vehicles entering the capital resulted in severe traffic congestion on major highways connecting Delhi with Haryana and Uttar Pradesh. Intensive physical checks conducted by joint enforcement teams from the Delhi Environment Department, the Transport Department, and the Delhi Traffic Police created extended queues at major border control points, including Rajokri on National Highway 48 (NH-48), the DND Flyway, Ghazipur, Singhu, Tikri, Badarpur, and Aya Nagar.
Commuters reported long delays on key routes connecting the capital with suburban commercial hubs. Traffic remained backed up for several kilometers along NH-48 near the Sirhaul toll plaza, obstructing both the main carriageway and adjacent service roads. Similar vehicular congestion occurred at the Delhi-Gurgaon, Delhi-Noida, Delhi-Ghaziabad, Delhi-Sonipat, and Delhi-Najafgarh border crossings. At the Aya Nagar entry point, transport inspectors turned back all incoming vehicles failing to meet mandatory BS-VI standards.
Enforcement data published by local authorities documented the scale of the border operation. The Northern Range of the Delhi Traffic Police reported that its teams inspected 7,657 vehicles between midnight on November 1 and noon on November 2, turning away 609 non-compliant vehicles. This followed operations conducted on November 1 between midnight and 8 p.m., during which traffic officers stopped 7,279 vehicles, turned back 714 non-compliant units, and impounded 38 vehicles.
Delhi Environment Minister Manjinder Singh Sirsa stated that combined enforcement teams had checked a total of 14,930 vehicles on November 1. Minister Sirsa confirmed that officers issued 566 formal penalty notices (challans) for PUC certificate violations and conducted physical inspections at 300 construction sites across the capital. To manage regional compliance, the Delhi Traffic Police conducted coordination meetings with police leadership from surrounding NCR districts while issuing advisories through electronic information boards, pamphlets, print outlets, social media platforms, and radio broadcasts.
Under current winter rules in effect from November 1 through January 31, all petrol and diesel passenger and commercial vehicles registered outside Delhi that do not meet BS-VI emission standards are barred from crossing into the capital. Electric vehicles, Compressed Natural Gas (CNG) vehicles, and BS-VI compliant internal combustion engine vehicles remain fully exempt from the entry prohibition.
Legal Challenges and Judicial Rulings
The enforcement of winter pollution curbs faced immediate legal challenges in the judiciary. On Monday, the Delhi High Court refused to grant an interim stay against the ban on non-Delhi-registered vehicles that do not meet BS-VI emission standards. A judicial bench comprising Acting Chief Justice Nitin Wasudeo Sambre and Justice Sanjay Sharma issued a formal notice on a petition filed by Faridabad-based lawyer Gurmukh Dass Kohli, scheduling the matter for joint hearing alongside a related petition on November 27.
The petitioner challenged a notification issued on June 23 by the Department of Environment and Forests, alleging that the rule unlawfully discriminates against vehicles based on their geographic location of registration rather than their actual emission outputs. The court filing highlighted that pre-BS-VI vehicles registered inside Delhi are permitted to operate within the city limits, while identical pre-BS-VI vehicles registered in neighboring Haryana are banned from entry. The petition argued that the blanket restriction applies regardless of daily AQI readings, disrupts free movement within the integrated NCR, lacks a scientific rationale, and overlooks less restrictive policy alternatives.
In a separate legal decision, the Supreme Court of India modified firecracker restrictions across the capital region. A bench comprising Justices M.M. Sundresh and Prasanna B. Varale authorized the sale of certified green firecrackers in Delhi-NCR from November 4 to November 6, permitting their use between 6 a.m. and 7 a.m. and between 8 p.m. and 10 p.m. on November 7 and November 8. The complete ban on all firecrackers is scheduled to resume on November 9.
To prevent unauthorized or conventional firecrackers from entering the market under green labels, the Supreme Court imposed specific manufacturing and distribution conditions. Manufacturers are required to hold valid certifications from CSIR-NEERI (Council of Scientific and Industrial Research – National Environmental Engineering Research Institute) and licenses from PESO (Petroleum and Explosives Safety Organization). Furthermore, every packaging box must feature a product-specific and batch-specific QR code.
The Supreme Court explicitly prohibited firecrackers containing barium compounds, products unapproved by CSIR-NEERI, and joined firecracker series commonly known as "ladis." The court instructed municipal authorities to designate specific physical locations for firecracker sales while maintaining a ban on online retail transactions. Police forces were ordered to inspect commercial markets, scan QR codes, and confiscate non-compliant products. Firecrackers are banned within 300 meters of hospitals, healthcare centers, old-age homes, educational institutions, and officially designated silence zones.
In its ruling dated October 29, the Supreme Court noted that a total ban had facilitated an illicit trade in conventional firecrackers while preventing the public from purchasing legitimate green alternatives tested at established research facilities. The court highlighted a lack of comprehensive data proving that the total ban implemented in 2024 had achieved its intended purpose, pointing to the absence of significant air quality improvements. The bench directed the CPCB, working alongside state pollution control boards, to compile daily air quality reports spanning three distinct phases: pre-Diwali (November 2 to 6), Diwali (November 7 and 8), and post-Diwali (November 9 to 30). Authorities were further ordered to monitor local pollution spikes, repair non-functional monitoring stations, clear post-festival waste, and enforce compliance under threat of contempt proceedings.
This report was prepared with AI assistance and checked against the sources it relied on. Read our editorial standards and methodology.
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