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If TDS is unknown, but conductivity is, one can estimate mg/L TDS using a conversion table such as the one presented here.
Conductivity | TDS |
( micro-mho/cm) | (mg/L as CaCO3) |
1 | 0.42 |
10.6 | 4.2 |
21.2 | 8.5 |
42.4 | 17.0 |
63.7 | 25.5 |
84.8 | 34.0 |
106.0 | 42.5 |
127.3 | 51.0 |
148.5 | 59.5 |
169.6 | 68.0 |
190.8 | 76.5 |
212.0 | 85.0 |
410.0 | 170.0 |
610.0 | 255.0 |
812.0 | 340.0 |
1008.0 | 425.0 |
See also: Calcium carbonate, Carbon dioxide, Chlorination, Dissolved oxygen, Langelier calculation, Langelier index, Larson-Skold index, Oddo-Tomson index, pH, Puckorius index, Ryznar index, Scaling Indices, Stiff-Davis index, Total dissolved solids, Water corrosivity
