Intake water before any treatment or use Reaeration Renewing air supplies in the lower layers of a reservoir in order to raise oxygen levels Recarbonization Process in which carbon dioxide is bubbled into treatment water in order to lower the pH Receiving waters A river, lake, ocean, stream or other watercourse into which wastewater or treated effluent is discharged
(1) Water that is direct from the sourceground or surface waterwithout any treatment (2) Untreated water, usually that entering the first unit of a water treatment plant