Water has been under a lot of stress in modern times. Each year, the world generates roughly 36 trillion kilograms (400 billion tons) of waste, which, unfortunately, for many years ended up in the world’s rivers, streams, lakes, and oceans. According to the U.S. Geological Survey (USGS), 50 per cent of groundwater supplies in North America are contaminated with pesticides. Water is subject to everything within the environment, including organic debris, petroleum, air pollution, and nutrients such as phosphates and nitrates. What does this have to do with swimming pools and hot tubs? Simple, water is the industry’s main ingredient, without good quality water being readily available the industry has nothing to offer.