Effluent sewer
Effluent sewers also currently serve fewer people than septic systems, which also use septic tanks, but simply dispose of the effluent by draining it into a leach field. About one quarter of United States homes dispose of their wastewater with septic tanks. However, effluent sewers are being looked at as a sewage treatment solution in areas where gravity sewer systems are not well-suited or when the high capital cost to build a gravity system is prohibitive. Areas that are less than ideal for gravity systems include areas that are large, but extremely flat and areas that require long-distance pumping, such as where homes are widely spread out or when several small villages or towns connect their sewage systems so that a centralized plant can be built.
Health in Egypt
Soakaway latrines, which are common in rural areas, often do not work properly due to the high groundwater table, infrequent emptying and cracks in the walls. Thus sewage leaks out and contaminates the surrounding streets, canals, and groundwater. Trucks that empty latrines and septic tanks do not necessarily discharge septage into wastewater treatment plants, but rather dump the content in the environment.