La Jolla homes get the same mineral heavy water as the rest of the county, and it's hard on plumbing, appliances, glass, stone, and skin no matter how nice the house is. The signs show up here the same as everywhere, spotted shower glass, scaled fixtures, scale in the water heaters, except here the fixtures are nicer and the glass is bigger, and that's usually what prompts the call.
Treatment splits into softening and filtration. Softening removes the minerals, and everything they were building up on benefits, the plumbing, the appliances, the stone and glass, and skin and hair that feel less dry after a shower. Filtration addresses the rest, taste, odor, and the deeper question of what's in the water, which people here ask about as much as anywhere. The systems get selected for the actual water, the actual household, and the finishes in the house.
The conversation is detailed and unhurried. What the water actually carries, what each system does, whole house versus point of use, and the maintenance over the years. Every recommendation comes with the reasoning behind it, and every decision is yours, made at your pace.