The main resources of the Office are :
- The Drinking Water Development Fund;
- The National Water Fund;
Exceptionally :
- Investment equilibrium subsidies;
- Grants from public or private organizations, national or international;
- The proceeds of its movable or immovable property, the proceeds of the borrowings made under the conditions provided for by the texts in force;
- Proceeds of royalties and dues of any kind, the collection of which shall have been duly authorized by the Government;
- Proceeds from the sale of its works and services;
- Donations and bequests;