Achieving Sustainable Development Goals. Efficiency in the Spanish Clean Water and Sanitation Sector

In recent years, achieving the Sustainable Development Goals (SDGs) is becoming a major challenge for local governments. This research focuses on the role of Spanish local governments in the fulfillment of SDG-6, which aims to ensure the availability and sustainable management of water and sanitation for all citizens. Specifically, this study analyses the evolution of the efficiency of Spanish local governments, and its determining factors, in the achievement of the SDG-6. The results indicate that the taxes associated with water supply and sanitation services, the private management of these services, population density, local government budget revenues, the income of the inhabitants of the municipality and the fragmentation of local governments are factors that can improve the evolution of the efficiency of Spanish local governments in achieving the SDG-6.