An Ancient Underground Salt – Naturally Pure and Unrelated to Marine Microplastics
Rock salt (Halite) from Wanon Niwat District, Sakon Nakhon Province, is fundamentally different from sea salt. It is produced from underground brine deposits, not from seawater evaporation. For this reason, it has an extremely low risk of microplastic contamination, which is commonly associated with marine environments.
🧂 Why Wanon Niwat Rock Salt Is Naturally Low in Microplastics
Microplastics are predominantly found in oceans, rivers, and the atmosphere. Sea salt often contains microplastics because it is produced directly from seawater.
In contrast, Wanon Niwat rock salt:
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Originates from ancient underground salt layers
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Has no contact with marine or surface water
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Is produced using traditional boiling and evaporation methods
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Contains no added chemicals, bleaching agents, or anti-caking substances
As a result, this salt is considered naturally clean and pure, making it suitable for health-conscious consumers.
Scientific note: To date, there are no reports of microplastic detection in underground rock salt sources from Northeastern Thailand. Based on geological principles, contamination from modern plastic sources is considered minimal.
🏺 History of Salt Production in Wanon Niwat
🔹 Ancient Period (Approximately 2,500–3,000 Years Ago)
Archaeological evidence confirms that rock salt production in Northeast Thailand dates back to the prehistoric and Iron Age periods.
The Songkhram River Basin, which includes Wanon Niwat, was one of the region’s most important ancient salt-producing areas.
Salt played a crucial role in:
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Food preservation
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Trade and exchange
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Settlement development
Salt was not merely a seasoning, but a strategic resource in ancient societies.
🔹 Modern Production Era (1983–1984)
In the modern era, villagers in Ban Kut Ruea Kham, Kut Ruea Kham Subdistrict, Wanon Niwat District, rediscovered underground brine sources and began boiling salt for:
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Household consumption
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Local commercial distribution
Production remains largely community-based and traditional, ensuring that the salt:
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Avoids heavy industrial processing
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Contains no chemical additives
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Retains its natural mineral characteristics
🌱 Key Values of Wanon Niwat Rock Salt
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✔ Derived from underground brine, not seawater
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✔ Extremely low risk of microplastic contamination
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✔ Free from chemical additives
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✔ Over 2,500 years of historical continuity
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✔ A living heritage of Northeastern Thai wisdom
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