Simplified sewerage is most widely used in Brazil. It is estimated that in Brazil some 5 million people in over 200 towns and cities are served with simplified sewerage - or condominial sewerage. This corresponds to about 3% of the population of Brazil and about 6% of the population connected to sewers. They serve poor and rich alike.
Simplified sewerage has also been used in
*Bolivia, beginning with a pilot project in El Alto;
*Honduras, primarily in marginal areas of Tegucigalpa where simplified sewerage has been introduced in 20 communities with 24,000 inhabitants;
*Peru, primarily in marginal areas of Lima;
*in South Africa, where pilot projects were carried out in Johannesburg and Durban;
* in Sri Lanka, where the National Housing Development Authority implemented over 20 schemes in the 1980s and 90s.
In Pakistan, beginning with the Orangi Pilot Project in Karachi, a variation of simplified sewerage using larger diameter pipes has been used.