Quick Answer
It is crucial to purify water in the backcountry whenever there is a risk of contamination, such as in areas with poor sanitation, agricultural runoff, or near animal habitats. Water purification is essential in areas with high levels of E. coli, Giardia, or Cryptosporidium. Purified water protects against waterborne illnesses.
Waterborne Pathogens
In the backcountry, waterborne pathogens like E. coli, Giardia, and Cryptosporidium can be present in untreated water sources. These pathogens can cause waterborne illnesses, such as giardiasis, cryptosporidiosis, and E. coli infections. To minimize the risk of waterborne illnesses, it is crucial to purify water before consumption. Water purification methods, such as boiling, filtering, or disinfecting, can effectively remove these pathogens.
Water Purification Techniques
There are several water purification techniques available in the backcountry. Boiling water is the most effective method, but it requires a reliable heat source. A rolling boil for one minute can kill all waterborne pathogens. If a heat source is not available, a water filter or purification tablets can be used. A water filter with a pore size of 0.2 microns or smaller can effectively remove Giardia and Cryptosporidium. For example, the Sawyer Mini Water Filter has a pore size of 0.1 microns and weighs only 2 ounces.
Field Water Purification
In the field, it is essential to have a reliable water purification method. A portable water filter or purification tablets can be used to purify water in emergency situations. When using a water filter, it is crucial to follow the manufacturer’s instructions and to maintain the filter according to the manufacturer’s recommendations. For example, the MSR TrailShot Water Filter has a built-in pre-filter and a 0.2-micron filter element. It can purify up to 1 liter of water per minute and weighs only 6.8 ounces.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.