Is it possible to purify saltwater for drinking?

Desalination Methods

There are several methods to purify saltwater, including boiling, solar stills, and mechanical desalination. In the backcountry, boiling is a simple and effective method. To boil saltwater, bring it to a rolling boil for 1-3 minutes, depending on the altitude. This will kill bacteria, viruses, and other microorganisms that can cause illness.

Solar Still Techniques

A solar still is another method to purify saltwater. This involves creating a shallow depression in the ground, placing a cup or container in the center, and covering it with a clear plastic sheet. Weigh down the edges of the plastic with rocks and place a small amount of saltwater in the center. As the sun heats the plastic, water vapor will rise and collect in the cup. This method requires patience, but can be effective in warm weather.

Mechanical Desalination Options

For a more efficient and reliable method, mechanical desalination can be used. This involves using a portable desalination device, such as a handheld filter or a battery-powered pump. These devices use filters or membranes to remove salt and other minerals from the water. Some devices can remove up to 99% of dissolved solids, making the water safe to drink.