James Island is on city water, so this is something we recommend only when there is a genuine reason.
What people usually notice
The taste and smell of chlorine is the common complaint, and a filter at the kitchen tap handles it for a fraction of the cost of a whole-house system. That is often all anyone actually needs.
Rusty water is a different problem
If your water looks brown or orange first thing and clears after running, that is very likely old galvanised pipe inside your own house rather than anything wrong with the supply. A filter hides it; replacing the pipe fixes it. We would rather explain the difference than sell you the wrong thing.
Where a whole-house filter earns its place
In homes with older pipework, a sediment filter protects your taps, appliances and water heater from the debris coming off the inside of those pipes. That is a sensible, modest bit of equipment.
Ask for a test first
Anyone recommending equipment without testing your water is working from a price list rather than from your house.