4. How many business unit the Company's has ?
| TTW | PTW | |
| nameCustomers | Provincial Waterworks Authority (PWA) | Provincial Waterworks Authority (PWA) |
| Contract period | WPSA - 30 years (21 July 2004 to 20 July 2034) | - WPDA 25 years (15 October 1998 to 14 October 2023) - WPSA for the plant expansion 17 years (15 September 2006 to 14 October 2023) |
| Type of the Contract | Build-Own-Operate ("BOO") - remain the ownership in productions and distributions system after the contract end. | Build-Own-Operate-Transfer ("BOOT") - Transfer the ownership in productions and distributions system to PWA after the contract end. |
| Service areas | - Nakhorn Chaisri, Sampran, and Buddha Monthon Districts in Nakhorn Pathom Province - Mueng, and Kratoomban Districts in Samud Sakhorn Province |
all of Pathum Thani Province |
| Maximum capacity | 320,000 cu.m. / day | 388,000 cu.m. / day |
| Minimum Off-take Quantity (MOQ) PWA has to purchase (as of 1 Jan 2010) | 300,000 cu.m. / day | 320,000 cu.m. / day |
| Consession for operating tap water business | 25 years (11 March 2005 to 10 March 2030) from the Ministry of Natural Resource and Environment | 25 years (13 January 2000 to 12 January 2025) from the Ministry of Interia |
| Operation and Maintenance by | Thai Water Operations Co., Ltd. - the subsidiary of TTW and PTW | Thai Water Operations Co., Ltd. - the subsidiary of TTW and PTW |