The Israeli Water Authority permits water pumping and purification operators the freedom to minimise their energy demands during these peak daytime hours. To minimise costs and maximise profits, operators pump larger proportions of the daily water quotas during the night hours, and store these in numerous reservoirs throughout the country. They thereby reduce energy costs, while helping homogenise energy demands across the day-night cycle. In another instance, the Israeli Water Authority issues tenders for the construction of large-scale desalination plants that are as energy-efficient as possible.