What is Sodium Chloride?
Sodium Chloride is the chemical name for salt. When dissolved in water they dissociate to Sodium (Na+) and Chloride (Cl-)
These are not noticeable until they reach quite high levels.
NZ drinking water standards give guideline values of 200mg/L for Sodium and 250mg/L for chloride, after which water will begin to taste salty. Compare this to seawater which has around 3,500mg/L of salt.