This sizing calculation tool has been designed to assist UNHCR and WASH actors correctly size septic tanks in displaced settings taking into account numbers of users, wastewater and sewage flows, sludge and scum accumulation rates, desludging periods, liquid retention times, and average annual ambient temperatures.

Tags: Communal Toilets, Excreta Management, Excreta Treatment, Grey Water Disposal, and Septic Tanks. Languages: English. Organisations: UNHCR. Categories: WASH Blank Forms, WASH Design Guidelines, WASH Reference Documents, and WASH Technical Designs.