In recent years, various on-site water purification systems have been introduced to cope with water pollution in urban areas. In spite of a large number of construction of the systems, engineering of the systems has not been developed and still been in immaturated stage since database of experiences from previous works has not been established. Establishment of the database was done and then publicized in a WWW, which will help an engineering planner avoiding from an arbitrary decision and client to make construction orders toward an ideal picture.The database system included databases of previous works, technical reports and research papers from academic journals and search systems for selecting appropriate. processes and providing how to manage the processes for users.
