TTW Public Company Limited, together with its subsidiaries, produces and sells 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 under the water purchase agreement. It is also involved in the management of water production and distribution systems, and wastewater collection and treatment systems; and operation and maintenance of 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 April 2014. TTW Public Company Limited was incorporated in 2000 and is headquartered in Nakhon Pathom, Thailand.