Water Doctors Water Treatment Company is a division of HMI Water Specialists. Serving customers for over 35 years, we are an industry leader that specializes in custom-built and engineered water-conditioning equipment. Water Doctors is a member of Housing First Minnesota, Builder Club North and the Water Quality Association. Our products and services have received multiple awards from these associations. We strive to provide the most knowledgeable water treatment staff and the most advanced water-conditioning methods on the market.