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Canals and waterways in North Chennai have been progressively encroached upon by informal settlements and industrial discharge, severely reducing their water flow capacity and creating significant environmental contamination. Industrial units discharging untreated effluents directly into these water bodies have made rehabilitation difficult. Systematic canal clearance, industrial discharge monitoring, and relocation support for encroachment-affected communities are needed.
Tamil Nadu is the second highest e-waste producing state in India, generating thousands of tonnes of electronic waste annually from households, IT companies, and manufacturing units. However, formal e-waste recycling infrastructure remains inadequate, resulting in hazardous materials being processed by informal workers without safety protections. Establishing certified e-waste processing facilities and implementing producer responsibility norms strictly are critical.
Empty pesticide containers are being washed and dumped into the Suruliyar stream near Cumbum. The stream feeds drinking water schemes downstream and fish kills have started appearing. Suggested action: Identify and penalise the polluters, barricade the dumping access, and schedule a cleanup with citizen volunteers.
The Adyar river stretch near Kotturpuram bridge is completely covered with water hyacinth. Raw sewage outfalls and dumped garbage have made the smell unbearable for residents on the riverbank, and mosquito breeding has exploded. Suggested action: Identify and penalise the polluters, barricade the dumping access, and schedule a cleanup with citizen volunteers.
Despite zero-liquid-discharge norms, untreated dyeing water is entering the Noyyal at Anupparpalayam at night. Groundwater in nearby wells has turned brackish again. Suggested action: Identify and penalise the polluters, barricade the dumping access, and schedule a cleanup with citizen volunteers.
Dyeing units are releasing coloured effluent into the Sanganoor canal after midnight. The water runs purple by morning, and the smell makes the canal-side walking track unusable. Suggested action: Identify and penalise the polluters, barricade the dumping access, and schedule a cleanup with citizen volunteers.
Lorries are dumping construction debris on the edge of the Pallikaranai marshland at night near the Velachery–Tambaram road. The protected wetland is shrinking visibly, and the dumping continues despite the NGT order. Suggested action: Identify and penalise the polluters, barricade the dumping access, and schedule a cleanup with citizen volunteers.
Foam banks are forming on the Kalingarayan canal from untreated dyeing effluent. The 740-year-old irrigation canal supports thousands of acres and the contamination is reaching the fields. Suggested action: Identify and penalise the polluters, barricade the dumping access, and schedule a cleanup with citizen volunteers.