Water and energy are very much interrelated. In many EUWMA member states, the biggest problem is not the costs for water, it is the costs for energy. In water scarce countries, where water needs to be pumped deep from the groundwater levels, it is very expensive to do so. In many countries, a large part of the costs for water management consist of costs for energy. Therefore, cost reductions in the energy sector go hand in hand with cost reductions in the water sector. The water-energy nexus is the relationship between how much water is evaporated to generate and transmit energy, and how much energy it takes to collect, clean, move, store, and dispose of water.