The ROES-UV75 uses ultra-violet (UV) light to sterilize and kill up to 99. 99% of bacteria and viruses and disinfects non-chlorinated water sources such as private wells. Equally effective on city tap water, it removes a wide range of other contaminants including chlorine, taste, odor, fluoride, arsenic, lead, chromium and more. Enjoy unlimited safe, clean, great tasting water right at home for drinking, cooking and making delicious coffee, tea & ice. Save money, time, and hassle of buying costly, bottled water and live healthier with ultra-safe water that is contaminant free. This Essence 6-stage water filter system is made from high caliber components to deliver exceptional contaminant rejection rates and long-lasting, reliable performance. Designed and assembled in the USA, the Essence was developed based off APEC's 20 years of experience in RO design and production and will provide users with high-quality safe drinking water for many years to come! 6-Stage Ultra Violet Reverse Osmosis System: 1st stage: 5 micron 10" high-capacity polypropylene sediment filter -removes dust, particles, and rust. Protects and extends the life of the membrane and system. 2nd & 3rd Stages: Carbon Block 10 micron 10" -gets rid of unpleasant chlorine, tastes, odors, cloudiness and colors. Also removes VOCs and other common chemicals from the water. 4th Stage: High Rejection TFC reverse osmosis membrane. Removes up to 99% of TDS (Total Dissolved Solids) and contaminants such as arsenic, lead, fluoride, chromium, radium and much more. 5th Stage: Stainless Steel UV Light -sterilizes and destroys up to 99. 99% of bac., vir. and cysts in the water. 6th Stage: Coconut Shell Refining Carbon 10" - TCR (Total Contamination Removal) filter removes any possible residual taste from the tank.