The air quality in Delhi has shown slight deterioration this January compared to last year, with the average Air Quality Index (AQI) till January 30 standing at 307, compared to 306 during the same period in 2025, according to an analysis by the Centre for Research on Energy and Clean Air (CREA).

CREA`s analysis showed that January 2025, with an average AQI of 306, was the best January when it came to air pollution since 2022, when the monthly average AQI stood at 279. January 2026 now ranks as the second-best January since then.