Cooling water is the water used in industry to remove heat from processes. 2/3 industrial water is used as cooling water (removal of heat). In some industries such as electric power plants or oil refineries, even up to 90% of intake water is used as cooling. Cooling water is often not much polluted and can easily be reused for instance for cleaning processes. The heat, stored in the water after cooling can also be reused in other industrial or agricultural processes that require heating instead of cooling.