Finding literature on greywater management systems implemented in low and middle-income countries turned out to be dif cult. Information on greywater issues is scarce especially when compared to the abundant literature on latrines and toilets as revealed by the following example: An internet search on Google with the words “toilet developing countries” resulted in more than three million references. Less than 100,000 references were found when searching for “greywater developing countries”. Compared to water supply, excreta and solid waste management including stormwater drainage, greywater has traditionally been given lowest priority in environmental sanitation management systems. n urban and peri-urban areas of low and middle-income countries, greywater discharged untreated onto streets, into drainage channels, rivers or ponds leads to surface water contamination, deterioration of living conditions and increased health hazards. However, greywater is perceived as a valuable resource in rural areas and arid regions where it is often used untreated in irrigation. Without precautionary measures, this practice may lead to contamination of food, salinisation and clogging of soils and potentially also to groundwater pollution.