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Training people in water wastage is one of the core difficulties I have encountered in both development and emergency. Even self-closing taps get tied in the open position and then left.
As an extreme example, I worked on a Greenpeace ship some decades back as an engineer. We had limited capacity for fresh water, an educated and, one would assume, aware crew, yet we continuously found taps left running. In the end, we actually had to introduce water rationing to confront the problem. It was only after this that we had a pretty much 100% compliance in terms of closing a tap after use.
The moral of that little story is that essentially, education, education, education is the answer. This is the only real solution. And as mentioned by Martinager - tap-stands should have an adequate apron and drainage to avoid the mud, as this has, in itself, potential health hazards.
Cheers, Gavin