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This is fairly context specific. While the Sphere standards should be considered as a minimum, I have come across many places in rural Africa where people would only dream of having water that close. There have been cases of conflict where refugees have been provided to something like the Sphere standard wheras the resident population have less and cut into water pipes. On the other hand, I who am used to internal plumbing have found it a great inconvenience since my water pipe sprang a leak last night and I have to go to a borehole in the garden. You should try to provide something to same level as people are used to/expect if resources allow.

In general there is a direct correlation between water use and distance to the water point with a huge increase once you get to a tap in the garden and again when you get internal plumbing. Water use also has a direct correlation to health and hygiene outcomes so do the best your budget and water resources will allow with a target of what the people would normally expect in their pre-disaster situation.