The amount of electricity the water can conduct. It is expressed in a chemical magnitude. Please also use our information about TDS and conductivity. Conductivity makes reference to a substance's ability to hold an electrical current. Conductivity of water is analyzed on a frequent basis. Units for conductivity are studied in microsiemen per centimeter, uS/cm. Clean and pure water are unable to carry an electrical charge but water that possesses minerals and salt are able to. For this reason, conductivity is interpreted to the quantity of salt and minerals within the water. The salt amount in water is understood as TDS, or total dissolved solids. This can be measured in parts per million, ppm, which might even be converted to mg/L.