IIX Foundation provides a comprehensive overview of the role of Social Enterprises (SEs) in the Water and Sanitation services, highlighting the importance of improving access to improved sanitation and water sources. This brief includes an insight into the Water and Sanitation value chain, where SEs fit within the value chain to make impactful interventions, the innovation that SEs can bring, the market size and growth of the sector, and future trends and challenges that WASH might face.