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Culligan
Culligan is an international water purification company headquartered in Rosemont, Illinois. Culligan specializes in water softeners, water filtration systems and bottled water for residential and office applications.
Culligan was founded by Emmett Culligan in a blacksmith shop in Northbrook, Illinois. He perforated the bottom of a coffee can and used greensand to make his own water filter. Upon running water through his device, he discovered that the filter also behaved as a water softener. By 1938, the first Culligan franchised dealership opened in Wheaton, Illinois, followed by another in Hagerstown, Maryland. In 2004, Entrepreneur Magazine named Culligan the number one franchise in its industry. The company currently has over 800 dealers in the United States and Canada and sells its products in more than 90 countries. Culligan is privately held by the investment firm Clayton, Dubilier & Rice.
Information provided by Wikipedia : http://en.wikipedia.org/wiki/Culligan