Issues in Focus - Water Use is a set of fact sheets on water use and nuclear power: (1) Water use, power plants and EPA regulations; (2) EPA's proposed 316(b) regulation for existing facilities, (3) Environmental issues must be managed holistically, (4) Fish protection technologies reduce impingement and entrainment by once-through cooling systems; (5) Fish populations not affected by cooling systems; (6) Cooling towers consume twice as much water as once-through systems; (7) Cooling towers can have adverse environmental impacts; (8) The regulatory and legal history of cooling water intake systems; and (9) United Kingdom favors once-through cooling.