Soft water is safe to drink for virtually everyone.
If you participate in a very strict sodium-restricting diet, salt-softened water may not be right for you. To give you an idea how the additional salt affects your sodium intake, consider this: an average soft-water consumer takes in about five grams of sodium through normal eating and drinking. Of those five grams of sodium, one-third of one gram (0.336 g) is from softened water the equivalent weight of half a watermelon seed. A black olive contains 238 times the amount of sodium you’ll consume in an entire day from soft water! That’s how little sodium is added to your diet through soft water.
Some people mistakenly believe that soft water is salt water. Basically when you soften water it runs through resin beads to remove hardness. When the resin beads can’t remove any more hardness, you have to regenerate the resin with a salt solution. Only when the resin is regenerated does water flow through the softener as product water–flowing over beads that have been rinsed with a salt solution. Sodium is contributed to the soft water in trace amounts, but is generally not a cause for concern in most consumers’ diets.