Samsung water filters are tested and certified by NSF International, a global non-profit organization dedicated to public health, safety, and environmental protection. Occasionally check the filter indicator light on your refrigerator's digital display. When it's time to replace the filter, the indicator will light up red. You can also stick a monthly reminder label, included in every cartridge package, on the filter cartridge. Only purchase genuine water cartridges from Samsung to ensure reliability and performance. Be cautious of other brands or lower-priced imitations claiming compatibility with Samsung filters. Only original Samsung filters are guaranteed to fit your Samsung refrigerator. Samsung water filters use high-quality carbon block filters that remove over 99% of all potential contaminants from the water. This includes the taste and odor of chlorine, which is often used as a disinfectant in water treatment but can impart a certain smell or taste to the water.