CHENNAI: The Chennai Metropolitan Water Supply and Sewerage Board (CMWSSB) introduced QR code to raise complaints. By scanning the code, it takes them to the complaint site and people can register their grievances.

At present, a 24-hour grievance cell is available, where the public can raise their complaints regarding drinking water and sewerage. Also, 044-45674567 (20 connections) and toll free 1916 are available.