Here is a step by step tutorial of how to make a bushcraft tripod water filter using natural materials in the wilderness.  Water purification in the wilderness is life saving when dirty water is unsafe for consumption due to dangerous parasites.

This method will get rid of a lot of the parasites but will likely not remove giardia, or cryptosporidium so you will need to boil the water for five minutes AFTER running water through the tripod filter.

Health effects of drinking contaminated water are may include diarrhea, cramps, nausea, and headaches, fatigue and possibly jaundice.

Click here to read about how to make a Bushcraft Tripod Water Filter Using Natural Materials:

http://priorproperplanningpppp.blogspot.com/2014/07/diy-tripod-water-filter.html