have never once seen debris in the water.
Filtering and purification are not the same thing. You can't see bacteria and most filters don't filter much of it. A UV kills and and/or sterilizes it so it can't reproduce and spread in your system. Many water treatment plants now us UV instead of chemicals to purify water. And bottled water plants may even be using UV to purify. Our UV costs about $100 and is easy to install. I will provide pure water for years to come no matter where we go. Whether in the US or wherever we do not know if water is pure. With a UV we do. Overall the cost is less that buying bottles. Bottled water in some sizes costs more than gasoline. After the initial investment of $100 we know we drink pure water.