ONAS conducts technical, strategic and economic studies in the field of sanitation (sewerage) which involve:

 Design and updating of Urban Sanitation Master Plans

identifying current and future data (related to population, demographic growth, water and economy);
defining the most technically and economically efficient sewerage network route;
proposing the most suitable site for construction of the wastewater treatment plant of the city concerned;
study of the treatment process and size measurements of the wastewater treatment plant;
defining the investment amount and drawing up an action programme.

Conducting preliminary design and feasibility studies in the field of sanitation

technical evaluation
economic and financial evaluation.

Conducting and monitoring final design studies for the construction of sewerage networks and wastewater treatment plants

conducting preliminary project design studies;
conducting detailed project design studies;
preparation of tender documents for the construction of sewerage networks and wastewater treatment plants.

Monitoring of environmental impact assessment studies related to the construction of wastewater treatment plants

detailed description of the scope of the project;
assessment of the current location of the project site;
evaluation of the conclusions
identification of environmental protection measures.

Conducting strategic studies and defining the development indicators of the sanitation sector

prospective studies of future sanitation needs;
sanitation studies and sanitation master plans for the cities;
final design studies for the construction of sewerage networks, pumping stations and wastewater treatment plants.