Catalytic carbon with backwash would do well. I would also shock chlorinate the well and the filters and the plumbing system. I would get chlorine test paper/strips and test for 200 ppm chlorine from the well, and chlorine from each tap you have. I wound make sure the hot water taps get at least 100 ppm. Let that all sit for a while. http://deq.mt.gov/wqinfo/swp/PDFs/we...sinfection.pdf is one of many descriptions.
I expect your BB filters are in series.