Where Does Most Table Salt Come From?

Table salt is one of the most widely used minerals on Earth — yet few people know where it actually comes from. Most table salt does not come from the sea. It comes from underground salt deposits formed by ancient oceans that evaporated millions of years ago, and from brine extracted through solution mining. Understanding where table salt comes from explains why it is so affordable, widely available and consistent in quality.

Where Does Table Salt Come From?

Table salt primarily originates from two natural sources: underground rock salt deposits and saltwater brine. According to the USGS Mineral Commodity Summaries 2025, in the United States alone, salt in brine accounted for 42% of salt sold or used in 2024, rock salt for 40%, solar salt for 9% and vacuum pan salt for 9%.

The majority of table salt consumed globally is produced through solution mining and vacuum evaporation — not from the sea.

Source: USGS Mineral Commodity Summaries 2025

The Three Main Sources of Table Salt

1. Underground Rock Salt Deposits

Rock salt, or halite, is extracted from underground deposits formed by ancient seabeds that dried up millions of years ago. These deposits can be hundreds of feet thick and are located deep underground across the USA, Germany, Canada, Poland and China.

Miners use drilling, blasting and excavation techniques to extract rock salt, which is then crushed, screened and refined. Because it is less processed in its raw form, rock salt is primarily used for de-icing roads and industrial applications, though refined grades are used for food-grade table salt production.

2. Brine Extraction and Solution Mining

The most common source of table salt is brine — a concentrated saltwater solution extracted from underground salt deposits by pumping water into the deposit and recovering the dissolved salt solution. This brine is then evaporated using vacuum evaporation technology to produce pure, fine-grained sodium chloride.

Common table salt is largely derived from salt brines. This method produces highly consistent, ultra-pure sodium chloride suitable for food, pharmaceutical and industrial applications.

3. Solar Evaporation (Sea Salt)

Seawater flows into shallow ponds — known as salt pans — where sun and wind evaporate the water, leaving salt crystals behind. This traditional method, dating back thousands of years, is used extensively in India, Australia, Chile, Mexico and Mediterranean countries.

Solar evaporation produces sea salt, which retains trace minerals such as magnesium, potassium and calcium. However, most table salt sold in supermarkets is not sea salt — it is refined brine or rock salt with added iodine and anti-caking agents.

How Is Table Salt Made? The Refining Process

Regardless of its source, raw salt undergoes a refining process before reaching the consumer:

1. Extraction — rock salt is mined or brine is pumped from underground deposits
2. Purification — impurities including minerals, sediment and moisture are removed
3. Evaporation — brine is evaporated under vacuum conditions to form fine salt crystals
4. Drying — residual moisture is removed to ensure consistent grain size
5. Additives — iodine is added in most markets for nutritional fortification; anti-caking agents prevent clumping
6. Packaging — salt is screened, graded and packaged for consumer or industrial use

The result is the highly refined, free-flowing table salt found in kitchens worldwide — typically 99%+ pure sodium chloride.

Where Is Most Table Salt Mined in the World?

The countries with the highest volumes of salt production in 2024 were China (66 million tons), the United States (38 million tons) and India (30 million tons), together comprising 46% of global production. Germany, Australia, Chile, Canada, Mexico, Brazil and Turkey accounted for a further 23%. IndexBox

In the United States, the top producing states were Kansas, Louisiana, Michigan, New York, Ohio, Texas and Utah, which together produced about 95% of domestic salt in 2024.

Table Salt vs Sea Salt: Where Does Each Come From?

What Is Table Salt Made Of?

Table salt is made of sodium chloride (NaCl) — two ions bonded together: sodium (Na⁺) and chloride (Cl⁻). In its refined form, table salt is 99% or more pure NaCl. Iodized table salt has a small amount of potassium iodide added to prevent iodine deficiency. Anti-caking agents such as calcium silicate are added in small quantities to keep the salt free-flowing.

Frequently Asked Questions

• Where does most table salt come from?
  Most table salt comes from underground rock salt deposits and brine extracted through solution mining, not from the sea. Brine accounts for the majority of table salt production globally.
• Where does sea salt come from?
  Sea salt comes from the evaporation of seawater in shallow coastal ponds called salt pans. It retains trace minerals that are removed during the refining of table salt.
• Is table salt mined or made from the sea?
  Most table salt is produced from underground brine through solution mining and vacuum evaporation, not from the sea. Only a small percentage of table salt globally comes from solar evaporation of seawater.
• How is table salt different from rock salt?
  Table salt is highly refined sodium chloride with added iodine and anti-caking agents. Rock salt is less refined, contains natural mineral impurities and is primarily used for de-icing roads and water softening.

Fuentes:

• USGS 2025: https://pubs.usgs.gov/periodicals/mcs2025/mcs2025-salt.pdf
• Essential Minerals Association: https://www.essentialminerals.org/blog/salt-production-methods/