What is the conductivity value of pure water?

Pure water, theoretically, has a conductivity of 0 µS/cm because it does not contain any dissolved ions that can carry an electrical charge. This lack of ions is what makes pure water an insulator to electric current.

In practice, however, it’s difficult to attain completely pure water; even distilled water can have a very low conductivity, typically around 1–2 µS/cm, due to the presence of trace contaminants. Nonetheless, in the context of the question, when discussing pure water, the expected value is 0 µS/cm, which demonstrates that it has no significant ionic content to conduct electricity.

The other values represent varying levels of impurities where ion concentration increases, resulting in higher conductivity readings.