The amounts of sodium in softened water are minuscule compared to other normal dietary sources of sodium. In fact, ion exchange softening of water with 75 grains per gallon of total hardness would add less sodium to your drinking water than is allowed in beverages that meet the FDA regulations for "Low Sodium" labeling. In most cases less than 3% of your daily intake of salts comes from water consumption. For those that are on a low sodium diet it is important to consult with your doctor, there is a method available to calculate the sodium content of your water or a salt made of potassium chloride may be a better opton.