Hialeah draws from more than one water source. Knowing which one reaches your tap is a reasonable first step before you buy a filter. The City of Hialeah's water and sewer page explains that the city buys most of its drinking water from Miami-Dade County. The WASD 2025 water quality report shows that Miami-Dade County and the City of Hialeah together supply water from the Hialeah Reverse Osmosis Water Treatment Plant to residents of the city and the county's northwest service area, drawing from the Upper Floridan Aquifer at roughly 1,400 feet deep. The southeastern part of the city gets water from the John E. Preston Water Treatment Plant, operated by Miami-Dade County, according to the city's water and sewer page. Your water bill will say who your utility is. We're starting in Miami-Dade County, and Hialeah is part of that coverage area.
Two main system choices for Hialeah homes
Whole-house filter
A whole-house filter connects at the point where your supply line enters the home and treats water before it reaches any fixture inside. Reading how a whole-house filter works before you decide can help you figure out whether this is the right fit for your situation. If you are still asking whether you need one at all in Florida, that question has its own guide: Do I need a whole-house water filter in Florida?
Under-sink reverse osmosis system
An under-sink RO system sits inside the cabinet below one kitchen faucet and treats water at that point only. It is a different option from a whole-house filter, not a substitute for one. The guide on whole-house filter or reverse osmosis: how to choose walks through how to think about that decision.
What Hialeah's water supply looks like
Hialeah's water supply involves more than one provider. Miami-Dade Water and Sewer Department sells water wholesale to the City of Hialeah, as WASD's 2025 bond program report confirms. WASD runs several regional treatment plants, including the John E. Preston and Hialeah Water Treatment Plants. It also operates five smaller plants that make up the South Dade Water Supply System, plus the Hialeah Reverse Osmosis Water Treatment Plant, according to the WASD 2025 water quality report. That last plant pulls brackish groundwater from the Upper Floridan Aquifer and treats it before it goes out. The City of Hialeah also runs at least one reverse osmosis plant of its own, as the City of Hialeah's 2026 Water Quality Report covering 2025 data, published in July 2026, notes. The city also has emergency water connections with Hialeah Gardens and Miami-Dade County. If you want to read the city's report yourself, it is posted at hialeahfl.gov. For water quality questions, Hialeah's Water and Sewer Division can be reached at (305) 556-3800, or at extension 2542 if you need help reading the report. The WASD 2025 report covers monitoring from January 1 through December 31, 2025. For more on what these reports contain and how to read them, see How to read your utility's annual water report.
A note on water softeners in Hialeah
People ask whether a water softener makes sense in Hialeah. The WASD 2025 report prints no hardness figure for its main system, so the best way to get a specific number is to contact the utility that bills you. Whether hardness matters for what you want at home is a separate question. We are not selling softeners yet. The guide on water softener or water filter: what's the difference? lays out what each one does, and Do You Need a Water Softener in Florida? covers the broader Florida picture. If you want to know what published hardness numbers exist for the Miami-Dade area, the Miami Water Hardness guide explains what the reports say and what they leave out.
How to get a system installed in Hialeah
We are a new company. You call, send a few photos of where the water line comes in or of your open sink cabinet, and we give you one written price for a named system. A local plumber does the install. We only confirm an install date once that plumber has agreed to it. Right now we work with homes on city water in Miami-Dade, Broward, and Palm Beach counties. If anything about your setup is unusual, tell us when you call and we will let you know whether we can help. Reach us through the contact page.
Where these facts come from
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