Delhi has long been associated with some of India’s worst air pollution episodes, particularly during winter. Yet the capital has finished 21st among 48 cities with populations above 10 lakh in the Centre’s Swachh Vayu Sarvekshan 2026, ahead of Srinagar and Bengaluru.
Delhi scored 172 points, while Srinagar stood at 26th with 162.6 points and Bengaluru at 32nd with 152.6 points.
The numbers may look surprising at first. But the ranking is not a cleanest-air list. It assesses how cities are addressing pollution, including measures to control road dust, vehicular and industrial emissions, construction waste and solid waste, as well as public awareness initiatives.
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That distinction explains why a city battling severe pollution can still perform relatively well in the survey.
What does the Swachh Vayu Sarvekshan actually measure?
The survey is conducted under the Centre’s National Clean Air Programme (NCAP) and covers 130 cities across three population categories.
Rather than relying only on ambient air-quality readings, the assessment looks at the steps cities have taken to tackle pollution and how effectively those measures are being implemented.
According to the assessment process outlined in the report, cities first conduct self-assessments. These are scrutinised by state-level monitoring committees, followed by evaluation by the Central Pollution Control Board (CPCB) and field verification by independent teams.
That means the score reflects a combination of pollution-control action, implementation and measurable progress, rather than the AQI recorded on a particular day.
Delhi’s position has also improved significantly compared with the previous edition. The capital ranked 32nd in 2025 with 157.3 points. In 2026, it moved up to 21st with 172 points.
The improvement, therefore, is better understood as a measure of Delhi’s efforts to address pollution than as evidence that the capital’s air has become consistently clean.
So why is Delhi above Srinagar and Bengaluru?
Delhi’s higher ranking does not establish that its air is cleaner than Srinagar’s or Bengaluru’s.
The same principle applies to the two cities. Srinagar’s 26th position and Bengaluru’s 32nd position reflect their scores against the survey’s broader pollution-control parameters, not a direct comparison of which city’s residents are breathing cleaner air every day.
This is particularly important when rankings are read alongside real-world pollution levels.
Delhi continues to experience severe pollution episodes during winter, with its AQI frequently reaching hazardous levels. The report notes that the capital’s AQI has crossed 400 and, at times, 450. In January 2026, authorities invoked Stage IV of the Graded Response Action Plan (GRAP) after pollution reached critical levels.
So, Delhi’s position should not be interpreted as a clean-air certificate.
Even the top-ranked city still has pollution problems
The distinction becomes clearer when looking at the top of the table.
Lucknow ranked first among million-plus cities with 198 points, followed by Indore with 197 and Jabalpur with 195.
Yet Lucknow’s first-place ranking does not mean it has eliminated air pollution. Its PM10 levels have reportedly fallen substantially from the 2017-18 baseline, but remained above the national standard of 60 micrograms per cubic metre in 2025-26.
Among the measures credited to Lucknow are electric vehicles for waste collection, mechanised road sweeping and improved legacy-waste management.
The ranking is therefore designed to capture how cities are progressing against pollution, rather than declare which city has the cleanest air.
Is India’s air quality actually improving?
While there are indications of progress, the numbers also demonstrate the magnitude of the task at hand.
As per government data, out of the 130 cities surveyed, 108 of them have recorded lower levels of PM10 than the level registered in their baseline year 2017-18 for the year 2025-26.
On the other hand, only 14 cities have been found to meet the national PM10 standard.
This is a substantial gap. While the reduction in pollution levels is positive, low levels do not always mean that the air quality has attained healthy or acceptable levels.
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In the case of Delhi, what will be a meaningful indicator of progress is whether the pollution control efforts have led to fewer hazardous air days, lower particulate levels and lesser exposure to the populace.
The Swachh Vayu Sarvekshan 2026 rankings demonstrate Delhi’s improvement in areas covered by the survey. They do not demonstrate that Delhi has solved its air pollution problem.