About 96 per cent work completed in Kosasthalaiyar basin under ISWD Project for the Expanded Areas of Chennai Corporation in Tamil Nadu November 3, 2025 | Key Segments, Municipal Wastewater, Ongoing, Project Updates, Wastewater About 96 per cent work has been completed in Kosasthalaiyar basin under ISWD Project for the Expanded Areas of Chennai … This content is restricted.