Salt exists naturally in many environments, from ocean coastlines to inland mineral deposits, certain plants, and even specific types of soil. If you’re in a survival situation or simply curious about primitive skills, knowing where to look and how to extract usable salt can make a real difference. Here are the most reliable sources and how to use them.
Coastal Areas: The Easiest Source
If you’re anywhere near the ocean, you have access to an essentially unlimited supply of salt. Seawater contains roughly 35 grams of salt per liter, which means a single gallon yields about two tablespoons of usable salt. The challenge is separating it from the water.
The simplest method is boiling. Fill a container with seawater, place it over a fire, and let it reduce until only white crystals remain at the bottom. This works anywhere you can build a fire and find or improvise a heat-safe vessel. The process takes time, especially with larger volumes, but it’s straightforward.
Solar evaporation is the other option and requires no fire at all. Pour seawater into a shallow, wide container or scrape out a shallow basin in rock or hard-packed clay near the shore. In warm, dry weather, the sun does the work over a day or two. As the water evaporates, salt crystals form along the edges and bottom. You rake or scrape them up once the water is gone. This method has been used for thousands of years in places like Hawaii, where communities channeled underground seawater into shallow ponds and harvested the white surface salt by hand. It works best in hot climates with low humidity. In cool or rainy conditions, boiling is far more practical.
Natural Salt Licks and Mineral Deposits
Inland, your best bet is finding a natural mineral lick. These are areas where salt and other minerals concentrate at the surface, and they come in three general forms: wet, mucky seepage areas where mineral-rich water oozes from the ground; dry earth exposures of clay or sedimentary deposits, often visible above riverbank cut banks; and exposed rock faces with mineral crusts.
Some mineral licks are obvious. You’ll see white or colorful crystalline deposits on the surface of rocks or soil. Others are easy to miss, appearing as nothing more than a patch of bare, muddy ground or a damp seep. The most reliable giveaway is animal activity. Natural licks attract wildlife, so the surrounding ground is typically covered in tracks and worn trails. Parts of the modern highway system in the eastern United States were originally animal trails that led to salt sources, later adopted by Native Americans. If you spot a network of game trails converging on a single bare patch of earth, especially near a seep or riverbank, there’s a good chance you’ve found a mineral lick.
To use the salt from a lick, scrape the crystalline surface deposits if they’re visible. If the source is a wet seep, collect the mineral-rich water and boil it down just as you would seawater. The concentration will be lower than ocean water, so expect a smaller yield per batch.
Plants That Store Salt
Certain plants thrive in salty environments and accumulate sodium in their tissues. These are called halophytes, and they can serve as a salt source when no mineral deposit or coastline is available.
Glasswort (also called samphire or pickleweed, genus Salicornia) is one of the most well-known. It grows in coastal marshes, tidal flats, and alkaline inland areas, and its fleshy, segmented stems taste noticeably salty. You can eat it raw for a salt hit or burn it and use the ash as seasoning. Sea blite (Suaeda species) is another salt-accumulating plant found in similar environments. Saltbush (Atriplex species) grows in arid, alkaline soils across much of western North America and Australia, and its leaves carry a distinctly salty flavor.
If you can’t find halophytes, certain tree roots offer a less concentrated but viable alternative. Hickory, walnut, and pecan trees store small amounts of sodium in their root systems. The extraction process takes some effort: dig up roots, rinse off the dirt, and cut them into roughly one-inch pieces. Boil the pieces in a small amount of water until the liquid turns dark brown or black, then remove the root pieces and keep boiling until all the water evaporates. What’s left behind is a dark, tar-like substance that works as a salt substitute. It won’t taste like table salt, but it contains extracted minerals including sodium.
Reading the Landscape for Clues
Even without stumbling across an obvious salt deposit, the landscape gives you signals. Certain plants only grow where salt concentrations in the soil are high, so they act as living signposts. Inland saltgrass (Distichlis stricta) is one of the most reliable indicators. It tolerates extremely salty conditions and often dominates patches of ground in arid and semi-arid regions where salt has accumulated near the surface. If you see dense stands of a low, stiff grass in otherwise sparse terrain, especially near dry lake beds, alkaline flats, or areas with white-crusted soil, you’re likely standing on salt-rich ground.
White crusting on the soil surface itself is another strong indicator. In dry climates, evaporating groundwater pulls dissolved minerals upward, leaving a visible white or gray film on top of the dirt. This crust often contains sodium chloride along with other salts. You can scrape it up, dissolve it in water, filter the liquid through a cloth to remove dirt and debris, and then boil it down to concentrate the salt.
Hot springs and thermal seeps are worth investigating too. Geothermal water often carries dissolved minerals, and the areas around hot springs sometimes develop mineral crusts as water evaporates at the surface.
Purifying Wild Salt
Salt gathered from the wild will contain impurities: dirt, organic matter, and other minerals. A basic purification process makes it safer and more pleasant to use. Dissolve your raw salt or mineral-rich scrapings in clean water, then strain the liquid through tightly woven cloth, a bandana, or layered fabric to remove sediment and debris. Boil the filtered water to kill any microorganisms, then continue boiling or let it evaporate to recover the salt crystals.
Natural mineral deposits can contain elevated levels of other elements like iron, copper, manganese, and chromium alongside the sodium you’re after. In small quantities and short-term survival use, this is generally not a concern. The bigger risk is confusing salt deposits with other mineral formations. If a deposit has a strong metallic taste, unusual coloring (blue, green, or bright yellow), or causes irritation when touched, leave it alone. Genuine salt deposits taste cleanly salty, and the crystals are typically white, clear, or lightly tinted.
How Much Salt You Actually Need
In a survival context, your body loses sodium through sweat, and replacing it matters more than you might expect. Sodium deficiency causes muscle cramps, fatigue, confusion, and in severe cases, dangerous drops in blood pressure. In hot weather or with heavy exertion, you can lose several grams of salt per day through sweat alone. Even a small daily intake, a pinch or two dissolved in water or added to food, helps maintain basic function. Beyond survival, salt also preserves meat and fish, which makes it one of the most practically valuable substances you can find in the wild.