Pinterest: The local water supp

http://ift.tt/1gbZQKA

The local water supply in many towns of Mexico (and the world) is not safe for drinking. People resort to buying filtered water at significant expense. The sand filter cleans out 99% of organic contaminants, including giardia and cryptosporidium, and is inexpensive to build from locally available materials.

http://ift.tt/1f7WWdK