While many big Indian cities saw higher PM 2.5 levels in October, 2023, compared to the same period last year, Bengaluru saw a fall in PM 2.5 levels in October 2023 compared to the same period last year, according to an analysis by Respirer Reports.
It has found that while four cities -- Delhi, Mumbai, Hyderabad and Kolkata -- saw PM 2.5 levels higher in October, 2023, compared to a year ago, four State capitals saw a fall in October PM 2.5 levels between 2022 and 2023. They are Lucknow, Patna, Bengaluru, and Chennai. Respirer is a leading climate tech start up.