Water utilities can control losses in their operations by compiling an annual water audit of their supply operations, and by implementing programs to identify and contain inefficiencies. Such programs include leakage management, meter testing and enforcement against unauthorized consumption of water. Specific interventions exist to combat both apparent and real losses. It is important that the water utility determine the cost impact to the water utility from its apparent and real losses, and design an intervention strategy that takes into account the water resources and economic benefits of containing these losses. Apparent losses include customer meter inaccuracy, systematic data handling errors, and unauthorized consumption. Controling real losses involves active leakage control, water main rehabilitation and replacement, and pressure management.