Salt Sources

Part of Food Preservation

Without salt, long-term food preservation is severely limited. Knowing where to find it and how to extract it determines whether your group can stockpile food for winter or watch it rot.

Why Salt is Non-Negotiable

Salt is the single most important mineral for post-collapse survival. Beyond preservation, your body requires 3-5 grams of sodium per day to maintain nerve function, muscle contraction, and fluid balance. In a hard-labor survival scenario with heavy sweating, that requirement doubles. Without dietary salt, you develop hyponatremia within weeks — muscle cramps, confusion, seizures, death.

For food preservation, you need far more: roughly 1 pound of salt per 5 pounds of meat for dry curing, plus salt for brining vegetables, making cheese, and tanning hides. A group of 10 preparing for winter needs 500-1,000 pounds. Finding reliable sources is a top priority.

Source 1: Seawater Evaporation

The ocean contains approximately 3.5% salt by weight — about 4.5 ounces (130 grams) per gallon.

Solar evaporation method:

1. Collect seawater in the cleanest containers available — avoid harbor water or areas near industrial runoff
2. Pour into wide, shallow containers: baking trays, shallow pits lined with clay or plastic, or flat rocks with natural depressions
3. Place in direct sunlight with maximum wind exposure — surface area matters more than depth. Keep water depth under 2 inches (5 cm)
4. Stir daily to prevent a surface crust from forming, which slows evaporation underneath
5. As water evaporates, add more seawater to the same pan to build up salt concentration
6. When a thick slurry remains, stop adding water and let it dry completely
7. Scrape up the crystallized salt. Crush any large chunks

Yield: 1 gallon of seawater produces roughly 4.5 ounces (130 g) of salt. To get 10 pounds, you need approximately 35 gallons. Solar evaporation takes 3-7 days per batch depending on climate.

Boiling method (faster but fuel-intensive):

1. Bring seawater to a rolling boil in a large pot
2. Keep boiling until the volume reduces by 90%
3. Reduce heat to a bare simmer once crystals start forming — aggressive boiling at this stage spatters salt everywhere
4. When mostly solid, spread on a flat surface to dry completely

Yield: Same as solar, but takes hours instead of days. Uses significant fuel — roughly 1 pound of dry hardwood per gallon boiled. Reserve this method for when speed matters more than fuel economy.

Impurities in Sea Salt

Crude sea salt contains magnesium chloride and calcium sulfate, which taste bitter. For preservation, this doesn’t matter — use it as-is. For table use, dissolve the crude salt in a small amount of fresh water, filter through clean cloth, and re-evaporate. The bitter compounds are more soluble and stay in solution longer, so the first crystals that form are purer sodium chloride.

Source 2: Rock Salt and Mineral Deposits

Salt deposits exist wherever ancient seas evaporated millions of years ago. In North America, major deposits run through Kansas, Louisiana, Michigan, New York, Ohio, and Texas. Europe has massive deposits in Poland, Austria, and Spain.

Identifying salt deposits:

• Salt licks: animals congregate at natural mineral outcrops. Follow game trails — if multiple trails converge on a single spot of exposed rock or soil, check for salt. Taste test: touch your tongue to the rock surface
• White or gray crystalline crusts on rock faces, cave walls, or dry lake beds, especially in arid regions
• Salt springs: springs with a salty taste indicate underground deposits. The water can be evaporated just like seawater, often at higher concentration
• Dry lake beds (playas): the white crust on dried alkaline lakes is often a mix of salts. Taste test carefully — some playas contain sodium carbonate (washing soda) rather than sodium chloride (table salt). Sodium chloride tastes cleanly salty; sodium carbonate tastes soapy and alkaline

Processing rock salt:

1. Crush the deposit into small pieces using a hammer stone
2. Dissolve in water — use the minimum amount needed to dissolve all the salt
3. Let sediment settle for 30 minutes, then carefully pour off the clear brine through cloth
4. Boil or evaporate the filtered brine to re-crystallize clean salt

Source 3: Plant Ash (Potash Salt)

When no mineral salt is available, certain plants concentrate sodium and potassium salts in their tissues. Burning these plants and processing the ash yields a salt substitute.

Best plant sources:

Plant Type	Salt Content	Availability	Notes
Coltsfoot (Tussilago farfara)	High sodium	Widespread in temperate zones	Burns to a salty ash
Glasswort / samphire (Salicornia)	Very high sodium	Coastal salt marshes	Edible raw; ash is excellent salt
Saltwort (Salsola)	High sodium	Arid and coastal regions	Traditionally used for soda ash
Hickory bark	Moderate	Eastern North America	Traditional Native American source
Dried kelp / seaweed	High	Coastal areas	Burn dried fronds; mineral-rich ash
Palm fronds	Moderate	Tropical regions	Common in West African salt-making

Ash salt extraction process:

1. Dry the plant material completely — sun-dry for 2-3 days or dry near a fire
2. Burn to ash in a hot fire. You want white or gray ash, not black charcoal. If the ash is black, it needs more burning
3. Leach the ash: place ash in a container with a small hole in the bottom (a basket lined with grass works). Pour clean water slowly through the ash. Collect the brown liquid that drains out — this is lye water containing dissolved salts
4. Evaporate the lye water: boil until crystals form. The resulting salt substitute is a mix of potassium chloride and sodium chloride, plus carbonates
5. Refine (optional): dissolve the crude salt in water again, filter, and re-evaporate. Each cycle improves purity

Potash vs. Sodium Salt

Plant ash produces primarily potassium salts, not sodium chloride. Potassium chloride tastes similar to sodium chloride but slightly bitter and metallic. It works for food preservation — potassium ions also draw moisture from cells through osmosis. However, it does not satisfy your body’s sodium requirements. If plant ash is your only salt source, you still need to find sodium from mineral or seawater sources to prevent deficiency.

Source 4: Scavenging

In a post-collapse scenario, enormous quantities of salt exist in abandoned infrastructure:

• Grocery stores and warehouses: table salt, canning salt, kosher salt. Salt is heavy and low-value, so it’s often left behind by looters
• Road maintenance depots: municipal salt piles can contain tens of thousands of pounds. Requires purification (see Salt Preservation)
• Farm and feed stores: livestock salt blocks and loose stock salt — 50-pound bags are common
• Restaurant supply: commercial-size salt containers, brine solutions
• Water softener salt: 40-pound bags of high-purity sodium chloride, often sold at hardware stores
• Swimming pool supply: pool salt is food-grade sodium chloride

Salt does not expire. A bag of salt buried in rubble for 20 years is identical to the day it was manufactured. Prioritize salt during any scavenging run — pound for pound, it is more valuable than almost anything else you can carry.

Estimating Salt Needs

Use	Amount Per Person Per Month	Notes
Dietary intake	3-5 oz (90-150 g)	Higher in hot weather or hard labor
Meat curing	3-5 lbs (1.4-2.3 kg)	At 1 lb salt per 5 lbs meat
Vegetable fermentation	0.5-1 lb (0.2-0.5 kg)	2-3% salt by vegetable weight
Hide tanning	2-5 lbs per hide	Varies by animal size
Cheese making	0.5-1 lb per batch	Brining and surface salting
Total per person	6-12 lbs (2.7-5.4 kg)	Conservative estimate

For a group of 10 over 6 months: 360-720 lbs of salt.

Storage

Salt absorbs moisture from the air and clumps, but it does not spoil. Store in the driest container available — sealed plastic, glazed ceramic, or metal with a tight lid. If salt gets wet and clumps, break it up and dry it out. It is still perfectly usable. Keep salt elevated off dirt floors and away from direct rain.

Key Takeaways

• Seawater yields about 4.5 oz of salt per gallon — solar evaporation is free but slow, boiling is fast but fuel-heavy
• Rock salt deposits and salt springs are the highest-yield sources — follow animal trails to find natural salt licks
• Plant ash produces potassium-based salt substitutes that work for preservation but do not replace dietary sodium
• Salt never expires — scavenging abandoned stores, road depots, and farm supply shops should be a top priority
• A group of 10 needs 360-720 lbs of salt for a 6-month winter season