Fecal sludge management (FSM), also spelled faecal sludge management in British English, is a management system that safely collects, transports, and treats fecal sludge (also called septage) from pit latrines, septic tanks or other onsite sanitation facilities (OSSF). In other words, it deals with the mixture of human excreta and water that is collected in certain types of decentralized toilets and sanitation systems, instead of going into centralized Wastewater systems. FSM is particularly important in quite densely populated areas where much of the population is not connected to sewerage network, as is the case in most urban areas of developing countries. FSM is generally carried out as a service by local governments, water authorities, water utilities or the formal or informal private