As at 31 December 2025, Water Supplies Department has an establishment of 4,601 staff members, 401 being professional and assistant professional officers.
| Grade / Type of Staff | Staff Establishment |
|---|---|
| Professional | |
| Civil Engineers | 250 |
| Electrical Engineers | 52 |
| Mechanical Engineers | 46 |
| Waterworks Chemists | 33 |
| Accountants | 7 |
| Land Surveyor | 1 |
| Quantity Surveyors | 2 |
| Geotechnical Engineers | 3 |
| Landscape Architect | 2 |
| Statistician | 1 |
| Systems Manager | 4 |
| Subtotal : | 401 |
| Technical Staff | 2,245 |
| General and Junior Staff | 1,955 |
| Total : | 4,601 |