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Chennai Breathes Easier on Fine Particles, Dust Remains
23 Dec, 2025
Summary
- Chennai's Kodungaiyur station had the nation's lowest PM2.5 in 2024.
- Most Indian cities, including Chennai, struggle with higher PM10 dust pollution.
- PM2.5 exclusion from the NCAP target is a significant public health concern.
Chennai has demonstrated notable progress in managing fine particulate pollution (PM2.5) as of 2024. Data from 2017-2024 reveals one monitoring station in Kodungaiyur recorded the lowest annual average PM2.5 in India, significantly below national standards. Despite this success, coarser dust pollution (PM10), largely from road dust and construction, continues to be a widespread issue, with many monitoring stations exceeding national limits.
Coastal cities like Chennai benefit from meteorological factors such as sea breezes, contributing to lower PM2.5 concentrations compared to inland regions. However, the report emphasizes that city-wide averages can obscure significant variations. For instance, while some areas in Chennai meet PM10 standards, others face considerable challenges, underscoring the need for granular data.
Public health experts express concern over the exclusion of PM2.5 from the revised National Clean Air Programme targets, given its proven link to serious chronic health issues. They advocate for more localized data analysis and strategically placed monitoring stations to accurately assess and address diverse pollution sources across urban environments.
