U.S. Borax Operations

U.S. Borax is a truly global company.

In addition to our primary operations in California, we have processing plants and shipping facilities in China, Malaysia, France, Spain and the Netherlands and a global network of warehouses and stock points that provide secure supply reliability to our customers.

Boron, California, United States

U.S. Borax operations in Boron, California

Mine | Packaging | Refining

From our primary process and refining facilities, we produce and ship a third of the world’s refined sodium borates and boric acid—ensuring quality with onsite laboratory analysis.

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Wilmington, California, United States

U.S. Borax operations in Wilmington, California

Refining facility | Shipping

Our shipping facility in the Port of Los Angeles manages global bulk shipping operations while housing our refining operations for zinc borates and dry-spray DOT products.

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Owens Lake, California, United States

Trona mine at Owen's Lake, California


In operation since the 1960s, this site provides trona—a naturally occurring double salt—used in borate processing and refining at our Boron location.

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Coudekerque, France

U.S. Borax operations in Coudekerque, France

Specialty Refining | Shipping

This refining facility produces and ships the specialty borates used in highly regulated industries and applications such as agriculture, nuclear energy, and pharmaceuticals.

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Nules, Spain

U.S. Borax operations in Nules, Spain

Port Shipping | Packing | Distribution

Our subsidiary company Borax España is strategically located near the Castellon Port where we manage port shipping, packing, compacting, and distribution throughout the region.

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Rotterdam, Netherlands

U.S. Borax operations in Rotterdam, Netherlands

Shipping | Warehousing

One of the largest open sea access harbors in the world, we load, store, pack, and deliver industrial borates from this site.

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Global sales and support offices

U.S. Borax sales offices

Sales | Logistics | Support

Get global expertise paired with local support from our regional sales and customer support teams in Chicago, Shanghai, New Delhi, Singapore, and Frankfurt, Germany.

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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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