What did the Health Effects Institute report on Chennai's air quality?

The HEI report showed Chennai excelling in PM2.5 reduction while still facing challenges with PM10 dust pollution.

Why is PM2.5 exclusion from NCAP a concern for Chennai?

Excluding PM2.5 from the NCAP target is worrying as prolonged exposure causes serious chronic health issues.

Which part of Chennai had the lowest PM2.5 levels in the country?

Chennai's Kodungaiyur monitoring station recorded the nation's lowest annual average PM2.5 in 2024.

Home / Environment / Chennai Breathes Easier on Fine Particles, Dust Remains

Chennai Breathes Easier on Fine Particles, Dust Remains

23 Dec, 2025

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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 Breathes Easier on Fine Particles, Dust Remains

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.