Samsung water filters are tested and certified by NSF International, a 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 place a monthly sticker, included in each cartridge packaging, on the filter cartridge as a reminder. Only purchase original water cartridges from Samsung to ensure reliability and performance. Be cautious of other brands or lower-priced imitations that claim 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, including taste and odor from chlorine. Chlorine is often used as a disinfectant in water treatment, but it can impart a certain smell or taste to the water.