| Management and Maintenance Section |
| Usage of River and Road Division |
0550(82)4220 |
| Maintenance and Preservation of River and Road Division |
0550(82)4233 |
| Construction Section |
| Planning and Inspection Division |
0550(82)4221 |
| Construction Project Division |
0550(82)4225 |
| Land and Registration Division |
0550(82)4225 |
| Sewage Section |
0550(82)4223 |
| Water
Service Operation Section |
| Control and Water Bill Payment Division |
0550(82)4626 |
| Water Service Engineering Section |
| Facility Maintenance and Water Supply Division |
0550(82)4627 |