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Is Dew Collection a Viable Option for Backpackers?

April 5, 2026

Quick Answer

Dew collection can be a viable option for backpackers in humid environments, providing up to 1 liter of water per night, but it requires careful setup and maintenance.

Setting Up a Dew Collection System

To collect dew, backpackers need to create a surface that allows water to condense and run off. This can be achieved using a tarp or plastic bag, which is placed over a mesh or screen to keep insects out. The surface should be sloped slightly to allow water to run off into a collection container. For example, a rectangular tarp with a length of 3 feet and a width of 2 feet can collect approximately 0.5 liters of dew per night.

Maximizing Dew Collection

To maximize dew collection, backpackers should set up their system in a location with high humidity and low wind. This can be found in valleys or near bodies of water. The system should be set up at least 3 feet off the ground to prevent direct contact with the ground, which can be wet and cold. In addition, the mesh or screen should be fine enough to keep out insects, but not so fine that it prevents water from dripping through. A mesh size of 1/4 inch or smaller is recommended.

Maintenance and Sanitation

To maintain a dew collection system, backpackers should regularly inspect the surface for signs of contamination or damage. The system should be cleaned and disinfected regularly to prevent the growth of bacteria and other microorganisms. A ratio of 1 part bleach to 10 parts water is recommended for disinfecting the collection container and any other equipment. In addition, backpackers should regularly check the system for signs of clogging or blockages, and take steps to clear any debris or obstructions.

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