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U.S. Borax has been hauling borates out of Death Valley since the late 1800s, refining product in Wilmington since 1923, and mining at our current location in Boron, CA since 1927. We are proud of the communities in which we operate, and we want to be a good neighbor. Let us know how we’re doing!

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U.S. Borax, part of Rio Tinto, is a global leader in the supply and science of borates—naturally-occurring minerals containing boron and other elements. We are 1,000 people serving 650 customers with more than 1,800 delivery locations globally. We supply around 30% of the world’s need for refined borates from our world-class mine in Boron, California, about 100 miles northeast of Los Angeles.  Learn more about Rio Tinto.

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