About Sigma Water Sigma Pool and Water Systems started back in 1982 with one goal in mind: to provide the highest quality water purification products available, at a fair price. Tom Colosimo, President of Sigma Pool and Water Systems put it this way, "If everyone knew of the technology that exists in the water purification industry today, they would be amazed. Sigma's goal is, and always has been, to bring that technology into everyone's home. We hope to help people live a healthier, and fulfilling life." Our corporate headquarters are located in Gilbert, Arizona, a prime location for researching pools and tap water quality. Arizona has the second largest market for pools built, and is one of the worst areas in the nation for tap water quality (Time Magazine, November 15, 1993). Not only do we live in a water treatment hot spot, but we also have quite a bit of experience in the field. The Sigma Management team of Tom Colosimo, Terry Colosimo, Robert Kunze, Karl Colosimo, Mary Copelan, Bill Keely, and Brett Clark combines for over 90 years experience in the water treatment industry. The Sigma advisory panel, made up of various other industry experts and water specialists, adds an additional over 80 years combined experience to provide you with one of the world's most experienced water treatment teams. Although we maintain an international presence, we have never lost sight of the goals and values that have made us successful. We are, and have always been dedicated to the principles of QUALITY, RELIABILITY, AND SERVICE.