TTW Public Company Limited, together with its subsidiaries, is a key provider in Thailand, specializing in the production and sale of treated water. Under a water purchase agreement, the company supplies this vital resource to the Provincial Waterworks Authority, serving districts such as Nakorn Chaisri, Sam Pran, and Budha Monthon in Nakhon Pathom, along with Muang and Kratumban in Samut Sakhon. Beyond its primary water supply operations, TTW also manages water production and distribution infrastructure, oversees wastewater collection and treatment systems, and handles the operation and maintenance of various water supply projects.