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Septic System Design & Permits in Hialeah, FL

A septic design in Hialeah has to deal with high groundwater: the County's 2018 study found about 89% of the city's modelled residential septic...

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  • Septic design and permits
  • Hialeah, Miami-Dade
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Septic design and permits in Hialeah: the short answer

A septic design in Hialeah has to deal with high groundwater: the County's 2018 study found about 89% of the city's modelled residential septic parcels already at peak groundwater within 42 inches of the surface. New and whole replacement systems need a design by a Florida professional engineer, DERM approval and a Department of Health permit.

With the drain field bottom required to sit at least 36 inches above the wet-season high water table, many Hialeah sites need a raised field, and the city's small lots, roughly half of its homes are single-family and most were built before 1980, leave little room for one. The design often comes down to fitting a compact advanced treatment unit and a mounded field within the setbacks.

A soil test hole showing limestone with groundwater at the bottom, a hand auger and folding ruler beside it on a vacant lot
Illustration A soil test hole showing limestone with groundwater at the bottom, a hand auger and folding ruler beside it on a vacant lot.

Before designing, check sewer: Hialeah runs its own utility, which supplied its non-sewer data to the County, and the County counted 4,254 septic parcels in the city in 2020. If a public sewer abuts the lot, Ordinance 22-83 does not allow a new septic system. For business sites, note that the Hialeah and John Preston wellfields are among the County's wellfield protection areas, where non-residential uses on septic need a DERM permit.

What the numbers say about Hialeah

  • In the County's 2018 groundwater study, 611 of Hialeah's 689 modelled residential septic parcels (89%) already reached peak groundwater within 42 inches of the surface; the projection for 2030 was 649. (Miami-Dade, 2018)
  • The 2018 study also counted 120 non-residential septic parcels in Hialeah, 101 of them at the 42-inch groundwater threshold. (Miami-Dade, 2018)
  • Hialeah has its own water and sewer utility, one of those that supplied non-sewer data directly to the County's 2018 study. (Miami-Dade, 2018)
A small pale yellow concrete block home with jalousie windows behind a chain-link fence, a concrete septic lid in the front yard
Illustration A small pale yellow concrete block home with jalousie windows behind a chain-link fence, a concrete septic lid in the front yard.

How we handle design and permits in Hialeah

  1. We confirm whether public sewer is available at the lot.
  2. We arrange the site evaluation the Department of Health requires.
  3. A Florida professional engineer prepares signed and sealed plans for DERM.
  4. We submit both applications and follow them through inspection.

State fees are $100 for a new system application and plan review and $115 for a site evaluation, plus County review and engineering. (Rule 62-6.030)

Septic design and permits in Hialeah: questions

Can a small Hialeah lot fit a new septic system?

Sometimes, with a compact advanced treatment unit and a raised drain field, but setbacks and the 36-inch separation rule make it tight. If sewer is at the street, connecting is required instead.

Does a Hialeah business on septic need extra permits?

If it sits in a County wellfield protection area, such as the Hialeah or John Preston wellfields, a non-residential use served by septic needs a DERM wellfield protection permit.

Sources

Last updated: October 28, 2026. Facts and figures on this page come from these sources, opened on October 28, 2026. Prices are typical published ranges, not a quote.