Pure White Purified Drinking Water is a certified by "PNSDW" Philippine National Standard for Drinking Water. Equipment Certified by DOH-BHDT and FDA. The product water, collected from the supreme series purified water system, 21-stages 3000 GDP w/ 5 micron sediment filter Stainless frame, Filtration, Purification, Reverse Osmosis System. USA patent design certified NSF components with Ultraviolet Water Sterilizer 6GPM.