unds. lsbre has less than 4 ppm (parts per million) TDS, the lowest TDS ever measured for natural (untreated) water. TDS COMPARISON CHART {ppm) Iceend Spring 42 Crystal Splines 44 Poland Spina 54 Voss 64 Deer Park 72 ermcn Icelandic Glacial 74 Trump Ice 74 Ice Mountain 76 Saratoga 90 Spe