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Funding agency  KFW (German Development and Reconstruction Foundation)
Loans amount (loans & grants)
 411.28 million Euros
Inception of cooperation 1986
Major projects financed
 - Project of Sanitation of 11 Cities in the Catchment Basin of Oued Medjerda (95 million Deutsch Marks/48,5 million Euros);

- Project of Sanitation of Greater Bizerte (32.1 million Deutsch Marks / 16,4 million Euros);

- Project of Sanitation of the Cities of Mateur, Ras Jebel, Rafraf and El Alia (34 million Deutsch Marks / 17,3 million Euros);

- Project of Sanitation of the Cities of Sousse, Kairouan and Nefza (36 million Deutsch Marks /18,4 million Euros);

- Project of Sanitation of Small and Medium-Sized Cities (7 cities) (1,7 million Euros).

- Project of Sanitation of Small and Medium-Sized Cities II(23,6 million Euros)

-Project of sanitation of Sousse II (4,6 million Euros bid package I+ 16,5 million Euros bid package II) Extension and rehabilitation of 19 wastewater treatment plants and 130 pumping stations (54.9 million euros+0.76 million euros).
- Sludge discharge (6 million euros and 1.4 million euros for assistance mesures)
- sludge discharge (21 million euros)
- sanitation tecnical study for industrial zones ( a grant for an amount of 1.6 million euros)
- sanitation project of the Cities of Ben Gerdan, El Guetar, Rgab and Fouchana (recycling : 20million euros)
- Programme of equipement of industrial zones with integrated WWTP : 7,5 million euros.
The 10 medium-sized cities sanitation project (20 million euros).
- Donation of 13 million euros signed on 21/12/2022
- Donation (accompanying measures) of 2 million euros signed on 21/12/2022.
-Conversion of German debt of 11 million euros signed on 31/10/2023
- Energy Efficiency Program(32 million euros signed on 19-12-2017) .
- The extension and rehabilitation of wastewater treatment plants and  pumping stations program III (50 million euros signed on 07-12-2018) 
-Donation of 1.4 million euros signed on 17/05/2024 studies of the environmental pole in chotrana
- Donation of 1.9 million euros signed on 21/12/2023;accompanying measures for the extension and rehabilitation program of wastewater treatment plants and pumping stations.
- Donation of 0.52 million euros signed on 03/04/2020 study to prospect for the potential for the reuse of treated water from Mahdia
 



"ONAS figures in this website are made up annually at the end of April"

Official website of the National Sanitation Utility