The quality of our water is the number one reason to choose Filson Water. We manufacture our own state of the art purification and water treatment systems, which include carbon tanks, water softeners, reverse osmosis systems, 3 various micron screen filters, an ultra violet light system and we add ozonation twice to keep our water fresh. Filson Water's TDS (total dissolved solids) is a consistent 7 or fewer parts per million (PPM), our competition’s water can range from 80PPM all the way to 400PPM. Meaning, there is more lime, calcium, iron and other dissolved solids in their water. This makes our water the purest available in the USA and beyond!