The OECD has long been a strong advocate for water management that contributes to economic growth, environmental sustainability and social welfare. With a multi-disciplinary team drawn from across the organisation, the OECD provides analysis to improve the information base, identify good practice and provide a forum for exchanging country experiences. Specific areas of OECD expertise and tools of relevance to water involve financing, governance, regulatory policy and private sector participation. This report builds on this expertise to diagnose the main governance and financing challenges to private sector participation (PSP) in the water supply and wastewater sector of Tunisia, and provides ways forward to address these challenges.