Of recent I have seen the value of lime or lemon added to water. It cuts that chlorine taste and probably does well in killing some of the creepy crawly microscopic things that might be in the water that you can't see. This encourages you to drink.
This is something I do as well especially because the water is so vile at my location. Occasionally I will also add a no calorie sweetener. They have become so good at making it very sweet now that one pack of it makes a gallon for me.