Septic tank
In the United States, the 2007 American Housing Survey indicated that about 20 percent of all households rely on septic tanks, and that the overwhelming majority of systems are located in rural (50%) and suburban (47%) areas. Indianapolis is one example of a large city where many of the city's neighborhoods still rely on separate septic systems. In Europe, septic systems are generally limited to rural areas.
Water supply and sanitation in the Philippines
In 2005 the situation was as follows: Only 5% of the total population was connected to a sewer network.The vast majority used flush toilets connected to septic tanks. Since sludge treatment and disposal facilities were rare, most effluents were discharged without treatment. Within the entire country, septic tanks are the most common method of sewage treatment. In Metro Manila alone, about 75 local companies provide tank-desludging services.