Emmett Culligan created a water filter with a coffee can and some greensand in 1921 and today, the Culligan Company boasts of almost 100 years of producing water treatment systems for private and commercial use. They offer a diverse line of water treatment systems and service. Culligan water filtering systems are found in homes, offices, restaurants, industrial settings, and are used all over the world. The Culligan name is synonymous with fresh, clean water and by pursuing the vast opportunities to expand their business they now distribute water systems made not only for individual applications but also for commercial water treatment, drinking water systems, and whole-house filtration. They have set the standard for the water treatment industry.