Further Reading: Heading to Haiti with a Permaculture Vision, and a Plan
how about DIY colloidal silver https://www.youtube.com/watch?v=Acpvp_8gwlw&p=96F3D7E5FF687FC1&playnext=1&index=16
here is a link to a solution–Michael Pritchard makes filthy water drinkable with a unique bottle that is inexpensive please watch this video and pass it on to those who it might help https://www.ted.com/talks/michael_pritchard_invents_a_water_filter.html