A measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular (colloidal sol) suspended form.
Note to entry: TDS concentrations are often reported in parts per million (ppm)
Note to entry: TDS measurements are commonly used to assess the performance of water treatment systems. TDS values are often expressed in terms of CaCO3 or NaCl equivalents (ppm).