The amount of sodium in your drinking water from a water softener system can vary depending on the hardness of your water, but you are certainly not drinking salt water. However, even if you use potassium, I wouldnt drink water that has been through a water softener. Soft water, by contrast, has a low mineral content. In fact, on average, less than three percent of your daily sodium intake comes from drinking. We also have a separate water tap for drinking water only, so I expressed my concern.
While softened water is fine for bathing, I would use distilled water for drinking or cooking.
Hard water also can be turned into soft water by distilling it. Distilled water is safe to drink, but water run through a softener or ion exchanger presents some concerns. In less than minutes, I am going to tell you what is soft water is, why you should NEVER ever drink it and suggest safe water types you can drink instead.