Air quality in Chennai worsened in 2025, with PM2.5 pollution levels increasing across all seasons compared to 2024, according to a new analysis examining pollution patterns in major Indian cities.
The study titled ‘Meteorology-Driven Persistence of PM2.5 Pollution in Indian Cities’ analysed daily air quality data from 2024–2025 across six cities — Delhi, Patna, Kolkata, Mumbai, Chennai, and Bengaluru — using Central Pollution Control Board (CPCB) monitoring records.
Published – March 16, 2026 05:30 am IST
