Delhi's Air Quality Index (AQI) stood at 187 at 8 am on Monday, 27 October 2026, placing the national Capital in the 'moderate' category, according to the Central Pollution Control Board (CPCB). Environment Minister Manjinder Singh Sirsa credited the improvement to the collective efforts of Delhi's residents, civic bodies, and neighbouring state police forces.

What the Numbers Show

While the overall AQI reading of 187 — down from 153 the previous day — signals a marginal improvement, monitoring stations across the city told a more uneven story. Relatively cleaner zones included Burari (128), Badarpur (125), and Nangloi (150). At the other end, Jahangirpuri (251), Vivek Vihar (240), R.K. Puram (233), CRRI Mathura Road (231), Punjabi Bagh (229), Narela (227), and Mundka (226) continued to record elevated levels well into the 'poor' category.

The city's air quality has been primarily affected by fine particulate matter — PM2.5 and PM10 — whose concentration varies sharply by locality and time of day.

What the Government Said

Speaking on Monday, Minister Sirsa said: 'I thank the people of Delhi today. Even today, the AQI is moderate, around 180, while yesterday it was 153. The Delhi government, our colleagues in the Municipal Corporation, Delhi Traffic Police and the citizens of Delhi have continuously provided tremendous support.'

Sirsa also highlighted the role of police in neighbouring districts, noting that for the past three days, officers had been preventing polluting vehicles from entering Delhi — a cross-border coordination effort that officials say has contributed to keeping the overall index from worsening.

GRAP Stage 1 Already in Force

The acknowledgement of a 'moderate' reading comes even as the Commission for Air Quality Management (CAQM) last week invoked Stage 1 measures under the Graded Response Action Plan (GRAP), after the city's air quality had deteriorated to the 'poor' category. Under Stage 1, the use of coal and firewood in tandoors at hotels, restaurants, and open-air eateries is prohibited. The operation of diesel generator sets is also restricted, except for essential and emergency requirements. This comes amid the annual seasonal pattern in which Delhi's air quality typically worsens between October and January, driven by crop stubble burning in Punjab and Haryana, falling temperatures, and reduced wind speeds.

Yamuna Foam Returns Ahead of Chhath Puja

Separately, Delhi Minister Parvesh Verma addressed the reappearance of white foam near Okhla Barrage and the Kalindi Kunj stretch of the Yamuna — a visually striking and recurring sign of the river's persistent pollution crisis — ahead of Chhath Puja. Verma said: 'The length of the Yamuna in Delhi is 52 kilometres. There is no foam anywhere along these 52 kilometres. Where Delhi's boundary ends and Uttar Pradesh begins, there is only an endpoint where foam is visible because there is a very large waterfall there.' He attributed the foam to water turbulence at a cascade point, rather than pollution originating within Delhi.

Verma added that Chhath Puja preparations were progressing well, with additional ghats being constructed and the Delhi Jal Board tasked with supplying clean water at all ghat sites. The developments follow Delhi Chief Minister Rekha Gupta's recent inauguration of Yamuna rejuvenation infrastructure projects worth approximately ₹9,000 crore.

What Comes Next

With Delhi entering the peak winter pollution season, air quality officials and civic bodies will be monitoring the situation closely for a possible escalation to GRAP Stage 2, which carries stricter restrictions. Whether the current 'moderate' window holds will depend on weather patterns, the pace of stubble burning in adjoining states, and enforcement of vehicle and industrial emission norms across the Delhi-NCR region.