Hi Brian, the SPHERE ...

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Hi Brian,

the SPHERE Handbook names "A maximum of 20 people use each toilet (see guidance notes 1–4 and Appendix 3: Minimum numbers of toilets at public places and institutions in
disaster situations)." As for families, we had -in development, not humanitarian situations- good experiences made with a maximum of 4 families using 1 septic tank with an individual cabin for each family, provided the septic tank could be placed on intersecting (family) compounds. Note, that toilet refers in this context to indivuidual cabins, not the more expensive subterranean part, the solidly built septic tank / 3 chamber latrine. You can download the SPHERE handbook here: http://www.sphereproject.org/resources/download-publications/?search=1&keywords=&language=English&category=22