Soft water is generally described as having a neutral and refreshing taste. This is because it contains fewer dissolved minerals compared to hard water. While hard water often has a slightly bitter or metallic taste due to minerals like calcium and magnesium, soft water lacks these taste-altering elements.
However, the taste of softened water can be influenced by the original water supply. If the source water already had a sweetness, it may persist after softening. Some people may even describe this sweetness as chalky or mineral-like, even if it's not a true sweetness.
In summary, soft water is not inherently sweet, but it is often perceived as having a neutral and refreshing taste. The presence of certain minerals in the original water source can affect the taste, sometimes leading to a perceived sweetness.