The Pure Water Mini Classic Countertop Water Distiller is a compact and portable water distiller that produces approximately 0.8 gallons/3 liters of distilled water every 3 ½ hour cycle. "Distillation is best purification method even comparted to reverse osmosis." Water Distiller - 99.99+% pure water Fit on the countertop 304-grade stainless steel. Made-in-the-USA water Original price $795 Please see below link for the water quality report on the manufacture's website https://www.purewaterinc.com/home-products/pure-water-lab-results/