Greywater reuse in rural schools : wise water management : guidance manual

At the present time one third of the world's population lives in water scarce areas. By the year 2050 it is estimated that the proportion of people living in moderate water stress conditions will increase to two thirds and a half of the population will be living under severe water stress conditions. The wisewater management is a new concept to provide water supply and sanitation services in arid and semi arid rural areas that was developed following WHO recommendations for the safe reuse of water. It was conceived in Madhya Pradesh (MP), a central state of India that has a high rural population with limited access to water and sanitation. The greywater reuse system which is part of wisewater management collect, treat and reuse bathroom water (shower and non toilet/black water) for recycling and flushing of toilets. The purpose of Manual is to establish acceptable means for greywater reuse as a guide for local government and residential schools, setting minimum standards for design, installation and maintenance and preparation and execution of water safety plans for minimizing health risks associated with greywater reuse. The Manual demonstrates methodology proposed by WHO to derive the health based targets and water safety plan for safe (re)use of greywater. Greywater reuse systems can be designed and implemented in the institutions anywhere in the world using the Manual.