Dow Chemical operates brine wells from which it extracts bromine in the middle lower peninsula of Michigan as well. Around Mt. Pleasant, St. Louis, and Midland. Besides all the uses you listed, it's also widely used as a fire retardant.

In 1973, Velsicol Chemical Corporation, who was operating in St. Louis, Michigan at the time, was manufacturing Polybrominated biphenyl fire retardant, as well as animal feed supplements. They were bagged similarly, and PBBs were accidentally shipped into the food supply. Which led to the largest livestock culling in US history at the time. https://www.michigan.gov/mdhhs/safety-injury-prev/environmen...

We clearly have too much red tape and regulation. Back to the golden age!