Every person, every home, and every business needs access to clean water. Marmon Water Inc, meets this universal need through a diverse group of water treatment companies located around the world. Marmon Water Inc. Our parent company, Marmon Holdings employs more than 20,000 people in 20+ countries. While Marmon is not (yet) a household name, we operate more than 100 leading companies across a variety of industrial manufacturing and service sectors. And, as a Berkshire Hathaway company, Marmon is a key part of one of the largest, most influential companies in the world.