Delhi concluded 2025 with 'very poor' air quality, recording no clean air days throughout the year according to AQI.in data. Air quality monitors in Connaught Place showed an AQI of 163, while a CPCB station registered 385. The city's air quality consistently ranged between 'moderate' and 'hazardous' categories based on US standards. Noida and Ghaziabad were also identified as highly polluted areas within the NCR region.