Since ancient times, water services provision in Spain has been a difficult task to drive. Several pressures have been identified. On the one hand, Spain is the most semi-arid country in the EU (Lopez-Gunn et al. 2012), and droughts and other water scarcity issues frequently affect some regions of the country. Moreover, climate change emerges as a major threat for water management in Spain. An increase of the average temperatures up to +1.9 °C has been predicted for 2040 (CEDEX 2011), jointly with a reduction in rainfall (up to 6%). In some specific areas, such as Canary Islands and the southern basins, significant changes in rainfall patterns are expected (Garrido et al. 2013). Southern basins could experience reductions of up to 13% of surface water runoff and around 15% of aquifers' recharge, while the reductions at Eastern Mediterranean basins would be below 10%. Northern basins will also experience reductions, but their relative profuse resource availability will likely mitigate the impact (Garrido et al. 2013).