BioSand Water Filters @www.friendlywaterfortheworld.com. This non profit out of Olympia, Wa provides inexpensive, durable biosand filters for approx $50 providing clean water to a family lasting for up to 30 years with almost no maintenance.
Rather than go into the hows, whys and what-for's, I will direct you to that area of the website so you can read what you want of it. http://friendlywater.net/HOW
This page will give you basic information on their product. You can also contact them by email at
info@friendlywater.net!
This page will give you basic information on their product. You can also contact them by email at
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