TTW Public Co. Ltd. engages in the production and sale of treated water. The company is headquartered in Nakhon Pathom, Nakhon Pathom and currently employs 321 full-time employees. The company went IPO on 2008-05-22. The company is involved in the production and distribution of tap water to the Provincial Waterworks Authority (PWA) in the vicinity of West Bangkok. The company operates through businesses: Fully-Integrated Water Management Business focuses on producing tap water and managing wastewater treatment in the Bang Pa-In Industrial Estate, Phranakorn Sri Ayutthaya. The company also oversees water production systems, distributes water supply, and treats wastewater for Amata Nakorn Industrial Estate, Chonburi and Amata City Industrial Estate, Rayong; Water Supply Management Business, which produces and distributes tap water to the Provincial Waterworks Authority in Samutsakorn-Nakhonpathom and Pathumthani-Rangsit areas; and also involved in investment in other businesses.