What should I record first?
A dedicated kitchen system treats a narrower use than a point-of-entry installation. If the goal is drinking or cooking water, compare the specific tap and refrigerator needs; if several fixtures or hardness-related appliances are affected, consider the broader plumbing scope.
What changes the recommendation?
Compare model-specific performance, flow and capacity for the chosen location. A whole-home filter does not automatically soften water, and under-sink RO does not change showers or every hot-water appliance. Each technology needs its own defined purpose.
What should the service scope include?
Ask the provider to explain plumbing access, startup checks, recurring parts and service cost for both options. Avoid adding a second system without an additional treatment objective. Keep source evidence and actual property measurements at the center of the decision.
Apply the correct source evidence
Confirm the supplier on the property water bill. Port St. Lucie’s public report applies to its Utility Systems customers; a mailing address does not prove supplier, and a private well needs its own testing. See the Port St. Lucie source guide before applying a report or selecting a treatment goal.
Review the 2025 Water Quality Report for the appropriate source boundary. Source review: October 4, 2026. This guide provides decision questions; equipment selection and any safety-related interpretation require appropriate measurements and qualified advice.
Continue with the related decision
Under-sink reverse osmosis · All solutions · Local Learn guide · Water check