The Greater Chennai Corporation (GCC) has started preparation work to improve the existing sewerage system in core city areas such as Anna Nagar, Teynampet, Kodambakkam, Royapuram, Adyar, Thiru Vi Ka Nagar and Tondiarpet. These works involve large-scale digging of roads.
The existing sewerage system was designed 40 years ago for lesser buildings and population. At present, over 100 wells in residential areas of Anna Nagar West have been polluted due to the defects in this old sewerage system. Similarly, due to this sewerage system, over 15,000 streets in the core city have been facing issues of sewage overflow and pollution of groundwater. An interim detailed project report has also been prepared to improve the sewage collection network of three sewage treatment plants in Kodungaiyur, Nesapakkam and Koyambedu.