TTW Public Company Limited, together with its subsidiaries, engages in the production and sale of treated water in Thailand. The company supplies water to the Provincial Waterworks Authority in the Amphur Nakorn Chaisri, Amphur Sam Pran, and Amphur Budha Monthon areas of Nakhon Pathom; and Amphur Muang and Amphur Kratumban areas of Samut Sakhon. It also provides water treatment and maintenance with the Provincial Waterworks; manages waste water treatment system; and operates and maintains water supply project. The company was formerly known as Thai Tap Water Supply Public Company Limited and changed its name to TTW Public Company Limited in March 2014. TTW Public Company Limited was incorporated in 2000 and is headquartered in Sam Phran, Thailand.