By Manoj Kumar N and Nandikesh Sivalingam
With the monsoon season receding, the number of cities with ‘Good’ air quality in September declined
Monthly ambient air quality trends in India: September 2025 air quality snapshot (pdf version)
Data sources
Ambient air quality data recorded by Continuous Ambient Air Quality Monitoring Stations (CAAQMS) is downloaded from the ‘Central Control Room for Air Quality Management – All India‘ dashboard operated by the Central Pollution Control Board (CPCB).