In the past, many process industries were located in coastal areas and were using once trough cooling systems such systems have a negative impact on the marine ecosystem, when discharging the water back to the sea at a higher temperature. More recently, stringent environmental regulations on industrial cooling water usage and discharge have made such once through systems redundant. According to new environmental standards, cooling the process water is required before discharging back, to avoid a thermal shock to marine life. Using Cooling Towers to cool the process results in economical control of the discharge temperatures within acceptable international and local guidelines that will not have any negative impact on the marine ecosystem.