Waterdrop WD-RF15-UF liquid Filter, Replacement 15UA-UF Under Sink aqua Filtration System, 0.01 Micron, 16000 Gallons High Capacity

This undersink filter cannot lower the TDS value because it removes harmful substances while retaining minerals such as potassium, calcium, sodium, and magnesium, which are beneficial for your health.. It is composed of inorganic salts and a small amount of organic matter. TDS stands for total dissolved solids. Please note that this Undersink aqua Filter cannot reduce TDS