Florida septic systems: maintenance, drainfields, buying a home, and replacement rules

What's happening? Start here

Find your situation, then follow the row. Any repair, change, or new system needs a permit from the office in the county lookup.

Who handles my septic permit?

From DEP's permitting FAQ and staff directory, checked November 7, 2026. DEP's FAQ also says many counties have local ordinances that go beyond state septic rules.

Routine maintenance

• Pump every 3 to 5 years. Florida's septic system owner's guide says to have your tank inspected and pumped every 3 to 5 years by a state-licensed septage disposal service. The EPA says to have it inspected at least every three years.
• Using a garbage disposal? Have the tank checked more often, or limit its use.
• Advanced systems need more. Aerobic treatment units and performance-based systems have specific Florida maintenance requirements. An aerobic treatment unit needs an operating permit renewed every 2 years.
• Only toilet paper and human waste. No "flushable" wipes, kitty litter, grease, strong chemicals, or medicines.
• Spread out laundry over several days, and fix leaky faucets and toilets.
• Route water softener backwash at least 15 feet from the tank and drainfield.
• Keep records. The owner's guide says good maintenance records can be a selling point.

Why is my drainfield wet?

The drainfield and the soil under it do most of the treatment. Water on top means wastewater isn't soaking in.

• Warning signs: standing water or damp spots, sewage odors, and bright green, spongy grass over the tank or drainfield, even in dry weather.
• Too much water: divert downspouts and other water away from the tank and drainfield.
• Solids in the drainfield: skipping maintenance lets solids move from the tank into the drainfield and clog it.
• Site problems: poor soils, steep slopes, or a high water table can cause failures.
• Roots: plant only grass over or near the drainfield.
• Weight: no driving or parking on the tank or drainfield.

Pools, patios, and home additions

Buying a home with a septic system

Records to ask for

• Construction permit, site plan, and final approval. Your county health department may have copies. The site plan shows roughly where the system is.
• Pumping and repair records, with dates, companies, and costs. The owner's guide includes a log for these.
• System type: conventional, aerobic treatment unit, or performance-based. Advanced systems have specific maintenance requirements and may need an operating permit.
• Tank size and drainfield details, such as the number and length of trenches.

Questions to answer before closing

1. Is it in a nitrogen-reducing area? Check DEP's map. Some areas require upgrades or limit conventional systems.
2. Is sewer coming? DEP suggests asking the public works or utility department of the city or county. Once you get a notice, you have 365 days to connect.
3. Where exactly is it? Find the tank and drainfield before you plan a pool, addition, or driveway.
4. Who will inspect it? Hire a registered septic tank contractor or licensed plumber. Look them up with the contractor list.
5. Any open permits? A construction or repair permit can transfer to a new owner who files an amended application within 60 days.

The official pages checked for this guide don't require a septic inspection when a home is sold statewide. Some local governments have their own rules, so ask your permitting office.

A septic records check is separate from a wind-mitigation report and a four-point inspection. Those reports are on Florida home inspections.

Repair or replace? Questions to ask first

1. Is there a permit? Florida law says no one may repair, modify, or abandon a system without a permit. A repair permit is valid for 90 days.
2. Is the contractor registered? Check the contractor list. Businesses must work under the name authorized by DEP.
3. Does the whole tank need to go? For a repair, the rule says a structurally sound tank of approved materials, within two tank sizes of the required capacity, can stay. It gets pumped and fitted with a solids deflection device.
4. Repair or full replacement? If roots clogging the lines caused the failure, removing them and replacing damaged material may restore the system.
5. Is a nitrogen-reducing system required here? Check the DEP map and ask your permitting office.
6. Is sewer available? If your system needs repair and sewer is available, you must connect within 90 days of written notice. One 90-day hardship extension is possible.
7. Who inspects the work? The permitting office, or a private provider inspector you hire. A master septic tank contractor may not inspect their own repair.

Sewer connection and upgrade notices

• One year's warning: the utility must notify you at least 1 year before sewer becomes available.
• 365 days to connect after written notice that sewer is available, if your system works properly.
• 90 days if your system needs repair and sewer is available, after written notice from the permitting agency.
• Paying over time: you may prepay connection charges in monthly installments over up to 2 years from the first notice. Local governments may allow hardship installment plans.
• Indian River Lagoon area: by July 1, 2030, existing systems must connect to sewer if available or upgrade to at least 65% nitrogen reduction.
• Help with costs: DEP says it works with water management districts and local governments on funding. Ask your city or county what's available now.

Nitrogen-reducing (ENR) areas

Nitrogen from septic systems can pollute springs and lagoons. A 2023 law, HB 1379, requires nitrogen-reducing systems in “impacted” areas.

• Since July 1, 2023: new systems on lots of one acre or less in impacted areas must be nitrogen-reducing, when sewer isn't available.
• Since January 1, 2024: in the Indian River Lagoon Protection Program area, new systems on lots of all sizes must be nitrogen-reducing. The area covers parts of St. Lucie, Indian River, Brevard, and Volusia counties.
• Springs areas: springs restoration plans can add requirements on top of HB 1379.
• Approved system types: in-ground nitrogen-reducing biofilters, NSF 245-certified aerobic treatment units, and nitrogen-reducing performance-based treatment systems.
• Check your property: DEP's requirements map.

Lawn fertilizer follows a different set of local rules. Those are on Florida fertilizer rules.

Who can work on your septic system

• You, only on your own owner-occupied single-family home.
• A state-licensed plumber. Plumbers are exempt only from septic contractor registration, not from permits and inspections.
• A septic tank contractor registered with DEP. Check the contractor list before you sign.
• Pumping: a state-licensed septage disposal service.
• Problems? Report unlicensed septic contracting to DEP.

After a flood or a sinkhole

• Don't pump while it's flooded. The EPA says pumping during flooded or saturated drainfield conditions can make the tank float out of the ground and damage pipes.
• Don't use the system until the water in the drainfield is lower than the water around the house.
• Well water: don't drink it until it's tested.
• Then inspect and pump. Pump the tank and lift station as soon as possible after the flood to remove silt and debris. Only trained specialists should clean or repair tanks, which may contain dangerous gases.
• Flood cleanup: steps for the house after the water drops are on Florida flood cleanup. The septic rules above still apply.
• Sinkholes: see DEP's Florida Geological Survey sinkhole information and the Florida sinkholes guide, and call your permitting office if the ground opens near the tank or drainfield.

All 67 counties: who issues septic permits

* DEP's FAQ says the other 50 counties are still handled by county health departments, but its table names only 48. Gilchrist and Lafayette aren't listed in either group, so this page sends them to their county health departments. Call to confirm.

Where sources differ

Questions people ask

How often should a Florida septic tank be pumped?

Florida's septic system owner's guide says to have your tank inspected and pumped every 3 to 5 years by a state-licensed septage disposal service. If you use a garbage disposal, have it checked more often. Aerobic treatment units and performance-based systems have their own Florida maintenance requirements.

Why is my drainfield wet?

The EPA lists standing water or damp spots over the tank or drainfield, sewage odors, and bright green, spongy grass even in dry weather as signs of a problem. Too much water from downspouts, a high water table, flooding, or solids that moved into the drainfield can all cause it. Call a registered septic tank contractor, a licensed plumber, or your permitting office.

Can I build a pool over a septic system?

No. Florida's septic rule says systems may not be within 5 feet of swimming pool walls. Decks and patios aren't held to the 5-foot setback, but a drainfield can't be installed beneath them. Check with your permitting office before you design the pool.

Do I have to replace my septic tank?

Not always. For a repair, Florida's rule says a tank doesn't have to be replaced if it's structurally sound, made of approved materials, and within two tank sizes of the required capacity. It must be pumped and have a solids deflection device on the outlet. Whether you need a whole new system depends on the failure, your site, and local rules.

What should I check before buying a house with a septic system?

Ask for the permit and final approval paperwork, the site plan, and pumping records. Your county health department or DEP office may have copies. Find out whether the property is in an area that requires nitrogen-reducing systems, and ask the local utility whether central sewer is planned.

Who issues septic permits in my county?

During the transfer to the Florida Department of Environmental Protection, DEP issues permits in 16 Northwest Florida counties (Escambia to Jefferson) and Marion County. In the other counties, the Florida Department of Health's county health department issues them. Use the county lookup on this page.

Do I need a permit to repair my septic system?

Yes. Florida law says no one may construct, repair, modify, abandon, or operate a septic system without a permit. A repair permit is good for 90 days. A construction permit is good for 18 months.

Can I add a bedroom to a house on septic?

Adding a bedroom adds sewage flow, so the system must be reviewed and may need changes. Florida law says a remodel that doesn't add a bedroom doesn't require a system upgrade, but it still can't cover any part of the system or encroach on required setbacks.

I got a letter saying sewer is available. How long do I have to connect?

Florida law says the owner of a properly working septic system must connect within 365 days after written notice that sewer is available. If your system needs repair and sewer is available, the deadline is 90 days after written notice from the permitting agency, with one possible 90-day hardship extension.

What is a nitrogen-reducing septic system?

It's a system that removes more nitrogen than a conventional septic tank. DEP calls them enhanced nutrient-reducing systems (ENR-OSTDS). Approved types include in-ground nitrogen-reducing biofilters, NSF 245-certified aerobic treatment units, and nitrogen-reducing performance-based treatment systems.

Where are nitrogen-reducing systems required?

Since July 1, 2023, new septic systems on lots of one acre or less in impacted areas must be nitrogen-reducing. In the Indian River Lagoon Protection Program area, which covers parts of Brevard, Indian River, St. Lucie, and Volusia counties, that applies to new systems on lots of all sizes. DEP has a map of these areas.

Do Indian River Lagoon homeowners have to upgrade existing septic systems?

DEP says that by July 1, 2030, any home or business with an existing septic system in the Indian River Lagoon Protection Program area must connect to central sewer if available, or upgrade to a system that reduces nitrogen by at least 65 percent.

Who is allowed to work on my septic system?

DEP says a homeowner may work only on their own owner-occupied single-family home. Otherwise, the work must be done by a state-licensed plumber or a septic tank contractor registered with DEP. All work still needs permits and inspections.

Should I pump my septic tank after a flood?

Not while the drainfield is flooded or saturated. The EPA says pumping then can make the tank float out of the ground and damage pipes. Once the water goes down, have the tank professionally inspected and pumped.

Can I plant trees near my drainfield?

Florida's owner's guide says to plant only grass over or near the drainfield, because tree and shrub roots can grow in from long distances and clog it. Keep vehicles off the tank and drainfield.

How do I find where my septic tank is?

Check your permit paperwork first. Your county health department may have a copy of the site plan. A registered septic tank contractor or licensed plumber can also find it. Call 811 before you dig.

Sources

• Florida Department of Environmental Protection, Onsite Sewage Program: program home, permitting FAQ, program transfer, Phase I transition, staff directory, permit portal, septic system owner's guide, alternative repair methods, contractor registration, contracting FAQ, report unlawful contracting, private provider inspections, HB 1379 nitrogen-reducing systems, springs BMAPs, requirements map, homeowners and realtors FAQ, sinkholes
• Florida Statutes: 381.0065, onsite sewage systems, 381.00655, sewer connection
• Florida Administrative Code: Chapter 62-6, standards for onsite sewage systems
• Florida Department of Health: county health departments, septic tank contractors
• U.S. EPA: how to care for your septic system, septic system malfunctions, what to do after a flood

This page is general information, not legal or engineering advice. Rules change and local ordinances can be stricter, so confirm with your permitting office before you buy, build, or repair.