How to Find Your Septic Tank Records First, Then the Probe

First, confirm the house is on septic

Plenty of North Miami owners are not sure, especially after the city's phased conversions put some streets on sewer. The Florida Department of Health runs the Florida Water Management Inventory, a statewide parcel map showing whether each developed property is on central sewer or a septic system, with each answer graded known, likely or somewhat likely. Miami-Dade's Water and Sewer Department has its own viewer for checking a connection, but it covers unincorporated areas, so inside North Miami the city's utility is the better source. A monthly sewer charge on the water bill is a strong clue as well.

Look up the permit record

Miami-Dade's Open Data Hub carries a layer called DOH Septic System, built from Health Department records and holding about 80,800 entries. Each one carries an application number, a system type such as new, existing, repair, modification or abandonment, and an approval date. Two cautions: the points are placed by folio number, coordinates or address, so a dot marks the lot rather than the tank, and the county states plainly that the data will contain inaccuracies.

The application number is what makes the next step easy. Florida's onsite rules moved from the Department of Health to the Department of Environmental Protection on 1 July 2021, and county environmental records are open to the public under Chapter 119 of the Florida Statutes, with an online request system run by the county's records staff. Ask for the permit file for your address. A repair permit on the state's certification form includes an as-built installation sketch, and an original construction permit may show the tank on a site plan. Very old systems may have little or nothing on file.

Follow the drain out of the house

With or without a drawing, the plumbing points the way. Find the main cleanout, usually a capped pipe near the foundation on the side facing the yard, or look for where the main drain leaves the slab. The tank sits in line with that pipe, a short distance out.

Florida's rule on location, 62-6.005, helps narrow the search. A system may not sit under a building or within 5 feet of a foundation, a pool wall, a mobile home wall or a property line, with limited exceptions for easements. It must be at least 10 feet from potable water lines unless they are sleeved or heavy-wall pipe, and 75 feet from the edge of surface water such as a canal. Older tanks can predate the current setbacks, and later additions, carports and pool decks sometimes went over the top of them.

Probe, then dig carefully

Push a thin metal soil probe into the ground every foot or so along the line of the drain, gently, until you strike a flat, solid surface a short way down. Tanks are concrete, fiberglass or polyethylene, so a hard top with the right footprint is a good sign. Look for the lids over the inlet end and the outlet end. Newer tanks have their access openings brought to within 8 inches of finished grade; older ones in North Miami can be deeper under sod, pavers or fill.

Before you put a shovel in, contact Sunshine 811 at least two full business days ahead. Florida law requires it, and member utilities mark their own public lines. They do not mark your septic tank or the pipe feeding it, so dig by hand and slowly near the drain line.

Do not open the tank

Finding the lid is as far as a homeowner should go. Miami-Dade tells owners never to open a septic tank themselves because of the dangerous gases and bacteria inside, and a lid already cracked can give way underfoot. Opening, pumping and hauling are work for someone holding a county Liquid Waste Transporter permit.

Make the next visit easier

Once the lids are found, write down measurements from two fixed corners of the house and keep them with your records. A riser that brings each lid up to grade saves digging at every pump-out, and the time a pump-out takes has more on why buried lids add to the visit. Miami-Dade also requires owners to register new and existing septic systems with the county.

Where to go from here

A tank you have just located and cannot date is due for septic tank pumping and an inspection. If sewer has reached your street, the job becomes septic tank abandonment. The pricing page shows how lid access affects posted pump-out ranges.