That city water you use at CG is same water you should be putting in your fresh water tank and it's already chlorinated.
Don't use the water fro drinking/cooking...but you use it to shower and probably wash dishes.
Showering.....human skin is the largest organ and absorbs things from water.
So if it's good enough to shower in then you can drink/cook with it.
Stinky water is due to water being stagnant OR water source was untreated.
Yes you can add chlorine but it doesn't take much.
Sanitizing is accomplished with just 1/4 cup per 15 gallons
CDC Recommended method.
Add 8 drops (almost one-eighth U.S. teaspoon) of regular liquid bleach per one gallon of water to be treated.