Welcome to Fort Union Supply and Trading Co.! Fort Union Supply and Trading Co. is an independently owned business that has been servicing customers in Williston, North Dakota since 1992. We have more than 30 years of experience in the janitorial supply industry. Fort Union Supply and Trading Co. is known as the cleaning supply store that you can rely on! Whether it's a tiny mess or a huge stain, we have to products that will make sure that all of your mistakes go away! Please give us a call if you have any questions or concerns regarding product availability!