EcoWater SyEcoWater Systems, a Berkshire Hathaway Companystems is a member company of The Marmon Group , an international company of over 140 autonomous manufacturing and service companies and a subsidiary of the Berkshire Hathaway Company. As a Water Quality Association (WQA) member, we belong to a not-for-profit international trade association representing the residential, commercial and industrial water treatment industry. more... See more text