Zanzibar Urban Water Supply & Sanitation


  • Reference: P-TZ-E00-007
  • Approval date: 19/12/2012
  • Start date: 19/08/2013
  • Appraisal Date: 04/06/2012
  • Status: OngoingOnGo
  • Implementing Agency: ZANZIBAR WATER AUTHORITY
  • Location: Unguja Island Zanzibar


The project comprises three main components, listed below:

(i)Water Supply Infrastructure: The Unguja urban area has population of over 500,000 which is about 40% of the total population of Zanzibar. While water production, transmission and primary storage capacity for the urban area were improved by earlier DP funded interventions, there has been limited improvement in service levels to customers, largely because there were no corresponding improvements of the distribution system. This component will therefore focus on water production, rehabilitation and extension of the distribution network, while holistically taking into account the whole system. Detailed designs will be carried out and infrastructure improvements will be implemented, based on recommendations of the existing comprehensive feasibility study funded by the Bank. The component will also:

(i) enable efficient operation of the system by creating proper pressure zones and appropriate pumping arrangements; and

(ii) enable improvements in water system management by installation of bulk, zonal and domestic water meters.

(ii)Sanitation and Hygiene: This component will support the construction of school and public sanitation and hygiene facilities. Gender aspects will be taken into consideration in the design of the facilities (with significant distances between the male and female facilities), based on the Ministry of Education (MOE) standards which stipulate one toilet for every 40 students. Priority will be accorded to the most needy schools in the project area, based on a database developed by MOE, taking into account gender considerations, number of students and number and status of existing facilities. This component will also include hygiene and sanitation awareness campaigns across Zanzibar.

(iii)Institutional Development Support and Reforms: The component will build on and complement ongoing capacity building activities aimed at enhancing ZAWA's capability in financial and commercial management, engineering and technical operations and institutional development. Specific focus areas will include reduction of UfW, improvement of the tariff structure, improvement of billing and collection efficiency and updating of the Business Plan. The component will include assistance in

(i) project management;

(ii) water resources management and the establishment and training of Shehia water committees (Shehia refers to the lowest administrative level of the government structure and the English name for this is 'ward') in the project areas;

(iii) implementation of environmental and social management plan; and

(iv) annual financial audits of ZAWA.


The Zanzibar Urban Water and Sanitation Project objectives are to:

1.Increase water production capacity to meet the demand of the project area.

2.Rehabilitate the existing water distribution network to ensure a significant reduction in Non-Revenue Water (NRW) - from the current estimated 65% to below 30% at project completion - and increased supply of potable water to the consumers.

3.Extension of the existing water distribution network to areas that have no water supply network at the moment.

4.Contribute towards improved health of the Urban Zanzibari communities through the provision of potable water and improved sanitation and a reduction in the use of water from unprotected sources.

5.Contribute towards an improved economic performance of the Communities through increased water supply to local businesses, including but not limited to tourism supporting industries and SMEs.


The current Unguja Urban Water situation is characterized by a water demand of 50 000 m

Key contacts

MARANDU Sabas Thomas - OWAS2


Finance source Amount
ADFUAC 14,000,000
GovernmentUAC 1,600,000
TotalUAC 15,600,000