Plumbing in Miami-Dade County
Miami-Dade County is unusual in that the county itself, through Miami-Dade Water and Sewer Department (WASD), provides water and sewer service to most of the county, including the City of Miami. The county also handles building permitting in unincorporated areas, which cover a large share of residents.
Tens of thousands of Miami-Dade properties still use septic tanks, many in areas with a very high water table where rising groundwater and sea level reduce how well septic systems work. The county has been working on converting septic properties to sewer, especially near waterways. Water from the Biscayne Aquifer is hard, and hurricane season brings storm surge, flooding and power outages that affect plumbing.
For homeowners, the biggest county-level questions are whether the home is on septic or sewer and whether it sits in a flood zone. A septic home with slow drains after heavy rain may be facing a saturated drainfield rather than a clog, and connecting to sewer where it’s available can end the problem. In flood zones, replacing a water heater or rebuilding after a storm may come with elevation requirements, so checking with the permitting office first avoids failed inspections.
County seat: Miami
What Miami-Dade County oversees that affects your plumbing
County water and sewer (WASD)
Miami-Dade Water and Sewer Department serves most of the county, maintains public mains and sets connection rules.
Septic-to-sewer conversion
The county has programs to connect septic properties to sewer, particularly where high groundwater threatens septic performance and water quality.
Unincorporated-area permits
The county issues building and plumbing permits for unincorporated areas, and has strict building codes shaped by hurricanes.
Flood zones
Much of the county is in flood zones, affecting equipment elevation and rebuilding after storms.
City plumbing guides in Miami-Dade County
Communities in Miami-Dade County
Kendall · Westchester · Fontainebleau · Country Club · Tamiami · Richmond West · Palmetto Bay outskirts · Redland
Miami-Dade County plumbing questions
Who supplies water in Miami-Dade County?
Miami-Dade Water and Sewer Department serves most of the county, including the City of Miami; some cities run their own utilities.
Is my Miami-Dade home on septic?
Many are, especially in older and unincorporated areas. Your WASD bill shows whether you pay for sewer service.
Can I convert from septic to sewer in Miami-Dade?
Where sewer is available, yes; the county has programs encouraging conversion. Check WASD for availability and current program terms.
Why do Miami-Dade septic systems fail during heavy rain?
A high water table leaves little dry soil for the drainfield, so storms and king tides can saturate it.
Who issues permits in unincorporated Miami-Dade?
The county issues building and plumbing permits for unincorporated areas.
Do I need to elevate my water heater in a Miami-Dade flood zone?
Rebuilding or substantial improvements in flood zones can trigger elevation requirements for equipment. Check with the permitting office before replacing equipment after a flood.