Managing Outcome for Sustainability

A trip around areas where programs on WASH have been implemented will reveal uncomfortable sights like broken-down water sources (borehole handpumps), open defecation sites where CLTS had been implemented and certain practices that may be considered counter-hygienic after some time. The idea of development is basically hinged on sustainability and the more these areas relapse, the more we will continue to experience counter development. How do we now manage our outcome such that we don't have this situation?