Under-Sink Reverse Osmosis in Miami

Why RO is popular in Miami condos

A large share of Miami living happens in multi-story buildings, from the towers of Brickell, Downtown and Edgewater to mid-rise buildings across the city. In those buildings the association controls the plumbing up to your unit, so a whole-home system is usually off the table.

An under-sink RO system works entirely inside your unit. It connects to the cold water line under the kitchen sink, uses a small storage tank or a tankless design, and delivers water through a dedicated faucet on the countertop or sink deck. Check your association's rules on installations before the visit; Jorge can work with what the building allows.

How RO handles Miami city water

Miami-Dade WASD disinfects with chloramine. In a multi-stage RO system, pre-filters condition the water before it reaches the RO membrane, then a final stage polishes it on its way to the faucet. Living Water's units are alkaline RO systems, which add minerals back after the membrane; see the compact alkaline RO page.

If you want RO for a specific contaminant, ask for the exact model's certification under the relevant NSF/ANSI standard for that contaminant. A general claim is not the same as a listing.

What Jorge checks under your sink

• Cabinet space for the filter housings and any tank, alongside a garbage disposal if you have one.
• A cold water connection and the condition of the existing shutoff valve.
• A drain connection, because RO sends a stream of concentrate water to the drain while it works.
• A spot for the faucet, either an existing sprayer hole or a new opening, which matters with stone countertops.
• Water pressure, since RO membranes perform best within a pressure range.

RO, whole-home or both?

In a Miami house, RO alone treats only the kitchen faucet; showers and laundry still get chloramine. Many homeowners pair a whole-home system with RO for drinking water. In a condo, RO alone is usually the practical answer. See whole-house filter vs. under-sink filter and alkaline vs. standard RO.

A note on water use during dry seasons

The South Florida Water Management District issued a water shortage warning for Miami-Dade County in February 2026 as Biscayne Aquifer levels dropped, asking residents to conserve voluntarily. RO systems send some water to the drain as part of normal operation. If that matters to you, ask about the system's efficiency and whether a tank or tankless design suits your use; see tankless vs. tank RO.

Updated 2026-10-17 · Living Waters · Jorge Canela, Water Quality Specialist