Delhi Environment Minister Manjinder Singh Sirsa on Tuesday said that the city recorded its best AQI for November 4 in seven years. Delhi registered an AQI of 291 on November 4, 2025. It had recorded AQI of 407, 343, 382, 447, 415 and 381 on November 4 in 2019, 2020, 2021, 2022, 2023 and 2024, respectively.