The history of these types of ...

The history of these types of assistance has been mixed. The successful ones do not just provide assistance, but they engage the locals so that they  take responsibility and are invested in the results in the long run. Hit and run does not work, beyond short term transient results. It is essential to remain in a supporting role with training, oversight and hands on assistance. The first rule is: keep it simple. Sophisticated equipment ultimately quits, often sooner than later--then what do they do? Passive, low cost,  local source technologies like slow sand filtration are ideal. As soon as a piece of equipment breaks down or supply of a product is lost all can be lost unless the personal access to the supporting organization continues. The distribution system is important. Putting clean water into a decrepit leaking plumbing network is a waste of time and effort.Someone also rightly stated that drinking water and sanitation go hand in hand.