This homesteading 100 year old way to filter rainwater in a barrel is how people used natural materials to make safer drinking water.  This plan for a homemade carbon filter is an improvised filter of gravel sand and charcoal.

Click here to read about 100 Year Old Way to Filter Rainwater in a Barrel:

http://www.theprepperjournal.com/2013/07/11/100-year-old-way-to-filter-rainwater-in-a-barrel/

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