Quick take
Use certified carbon at the smallest treatment scope that solves the problem. Whole-house treatment is unnecessary if the only complaint is drinking-water taste.
Best budget category: certified pitcher or faucet carbon
For drinking-water taste and odor, compact carbon filters are inexpensive and easy to replace. Look for an exact chlorine reduction claim under NSF/ANSI 42.
Best kitchen category: under-sink carbon
Under-sink systems offer higher flow and less countertop clutter. Frizzlife MK99 is one available example in this category.
Best shower category: shower-specific filter
Shower filters need evidence at shower flow and temperature. Weddell is notable because it publishes shower-specific third-party documentation.
Best whole-home category: carbon tank
Whole-house carbon is justified when chlorine taste/odor or exposure matters at showers, laundry and multiple fixtures.