The city recorded 194 in 2025, 181 in 2024, and 149 in 2023. Mumbai recorded its cleanest Diwali afternoon air in four years on Sunday, with the Air Quality Index (AQI) standing at 131 around 1 pm, according to the Central Pollution Control Board (CPCB). The reading was lower than the Diwali afternoon AQI recorded in the previous three years.