Water sanitation in 10 medium-sized cities

This program includes the construction and expansion of existing sewerage systems and the construction of waste water treatment plants (WWTP) in medium-sized cities in Tunisia. It is planned to dedicate the Swiss financing for the construction of the WWTP in Tajérouine, for complementary measures and for the implementation consultant.

Paese/Regione Periodo Budget
01.04.2015 - 31.12.2024
CHF  11’352’000

Although already quite advanced in the water and sanitation sector, Tunisia is characterized by wide disparities in development between its regions in the field of wastewater treatment and more generally in terms of infrastructure facilities and economic development. The National Sanitation Office (ONAS) manages 110 WWTPs and thus covers the connection of about 6 million people (out of a total urban population of 7 million). After developing sanitation infrastructure since the late seventies in the main cities of Tunisia, ONAS is now focusing on achieving WWTPs in small and medium size towns.


- Contribution to improving the health situation in places covered by the program.

- Contribution to the protection of groundwater resources and surface.

- Contribution to the improvement of existing WWTPs by providing ONAS with reliable data and tailor made courses for the staff.

- The program also contributes to the economic development of disadvantaged governorates through a regional rebalancing of investments in basic infrastructure.

Effetti a medio termine

Domestic, commercial and possibly industrial discharges are collected, cleaned and disposed properly, effectively, ecologically and hygienically. The operation of the related process is sustainably financed.

ONAS’ ability to measure the effectiveness of the operation in its WWTPs is improved, as well as its capacity for training the staff specially for the employees responsible for collecting measurements.


Risultati principali attesi:  

Construction of sewage systems, transfer pipes, disposal systems and WWTPs in the cities of the program. ONAS has the organizational tools, and the technical, financial and human resources to ensure the functioning of the treatment systems and maintenance.

The quality and reliability of in situ measurements in targeted WWTPs is improved.

The ability of ONAS Training Department to develop and implement training programs is increased.

Direzione/Ufficio responsabile SECO
Credito Cooperazione allo sviluppo
Budget Fase in corso Budget Svizzera CHF    11’352’000 Budget svizzero attualmente già speso CHF    0 Budget inclusi partner del progetto CHF    41’160’000
Fasi del progetto Fase 3 01.04.2015 - 31.12.2024   (Fase in corso) Fase 2 01.03.2012 - 31.12.2024   (Fase in corso)