Aug 1,2025:
In a bid to enhance environmental monitoring and address rising pollution levels, the Greater Chennai Corporation (GCC) has approved the installation of 75 Internet of Things (IoT)-enabled environmental sensors across the city. The decision was passed earlier this week and will cover all 15 administrative zones under the civic body.
According to civic officials, the move is aimed at establishing a real-time air quality monitoring network that will aid both governance and public awareness. The sensors, once deployed, will continuously track key environmental parameters such as PM2.5, PM10, nitrogen dioxide (NO₂), carbon monoxide (CO), temperature, and humidity.
At present, the city has limited monitoring capacity, with only a handful of static air quality stations managed by various agencies. “These new IoT-based sensors will bridge the gap in air quality data, particularly in areas that have seen rapid urbanisation or industrial activity,” said a senior official from GCC.
The environmental data collected will be transmitted to a central command and control centre. Officials added that the data will also be made accessible to the public through a dedicated online platform and mobile application, allowing citizens to monitor real-time pollution levels in their vicinity.
The initiative is being implemented with the support of private partners specialising in smart city solutions and environmental data systems. The deployment is expected to commence in the coming weeks, with completion targeted by the end of the year.
Medical professionals have welcomed the move, citing the need for timely data in mitigating health risks. “Chronic exposure to polluted air is a significant contributor to respiratory illnesses. Real-time monitoring can help alert vulnerable populations and shape public health responses,” said Dr. R. Krishnaswamy, a city-based pulmonologist.
The sensor network is part of a broader plan to bring Chennai’s environmental strategies in line with the objectives of the National Clean Air Programme (NCAP). Under the NCAP, urban centres across India are required to adopt advanced tools and policies to reduce pollution and improve air quality.
Officials said the real-time data would also be used to evaluate the effectiveness of pollution control measures taken in specific zones. “This is not just about collecting data, but using it to take informed decisions on traffic control, green cover expansion, and industrial regulation,” the official added.
The GCC believes that the project will set a benchmark for smart environmental governance in metropolitan areas. With the sensors in place, Chennai will become one of the few Indian cities with a fully integrated, IoT-based pollution monitoring grid.
