Miami-Dade County is located in the Southeast Florida region of Florida. Extremely porous oolitic limestone (Miami Limestone) with sandy soils and very high water tables, often within 1-3 feet of the surface. The Biscayne aquifer is the primary drinking water source and is highly vulnerable to contamination due to the porous limestone. Understanding local permit requirements and soil conditions is essential before installing, repairing, or inspecting a septic system.
County DOH site evaluation and construction permit required before installation under FL Statute 381.0065. Soil and water table testing determines system type. Must use a DEP-registered or Master septic contractor. Permit fee approximately $600. Miami-Dade has extensive sewer infrastructure with mandatory connection ordinances in many areas.
Repair permit required from FL DOH-Miami-Dade Environmental Health. A DEP-licensed contractor must assess the failure and submit a repair plan compliant with DEP rule 62-6 FAC. Repair permit fee approximately $350.
Point-of-sale septic inspection is not required statewide in Florida. Voluntary inspections are available through DEP-licensed contractors. Operating permit renewals required for ATU and performance-based systems.
FL DOH-Miami-Dade Environmental Health
Contact the county environmental health department for permit applications, soil evaluation scheduling, and regulatory questions.
Extremely porous oolitic limestone (Miami Limestone) with sandy soils and very high water tables, often within 1-3 feet of the surface. The Biscayne aquifer is the primary drinking water source and is highly vulnerable to contamination due to the porous limestone. Western areas border the Everglades with muck and marl soils over limestone.
Miami-Dade is Florida's most populous county with extensive Miami-Dade Water and Sewer Department coverage. Despite widespread sewer availability, an estimated 120,000+ septic systems remain, primarily in older neighborhoods and unincorporated areas. The porous Biscayne aquifer makes septic systems a significant groundwater contamination concern. Sea level rise and king tide flooding increasingly compromise coastal and low-lying septic systems. The county has a court-mandated septic-to-sewer conversion program. Mandatory sewer connection is required where service is available.
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Septic to Sewer Conversion
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