Septic Tank Pumping Cost in Tennessee (2026)

Sourced from TDEC rules at Tenn. Comp. R. & Regs. 0400-48-01, the Tennessee Department of Health, county health department fee schedules, Public Chapter 208, Acts of 2025 (SB 113 / HB 199, approved April 15, 2025), — last checked August 2026.

What Pumping Costs Across Tennessee

Pumping remains the cheapest thing you can do to a septic system, and by a wide margin. These are observed market ranges, not official figures — no Tennessee agency sets, publishes or regulates what a pumper charges.

Treat any site quoting a precise statewide average with suspicion, including this one on the headline number. What we can tell you precisely is what the state charges, because those figures are published — and one of them is worth knowing before you panic about a failing system.

Repairs carry no permit fee from TDEC, and Knox and Hamilton counties also charge nothing to permit a repair. If a pumper tells you the system needs work, the permit itself is not what will cost you.

Tennessee Does Not Require You to Pump on a Schedule

Nearly every guide states that Tennessee requires pumping every three to five years. It does not. The entire state maintenance rule — Tenn. Comp. R. & Regs. 0400-48-01-.13 — is three sentences long, and none of them mentions an interval.

What it actually says is that the property owner is responsible for maintaining the system in a safe and sanitary manner, and that if the system malfunctions the Commissioner issues a written notice giving the owner a maximum of thirty days to repair, replace or improve it. That is the whole obligation. Tennessee is reactive, not scheduled — and the thirty-day clock is the part worth remembering, because it starts whether or not you are ready for it.

So where does the familiar number come from? From guidance — and Tennessee publishes two versions of it that do not agree:

We are presenting both rather than picking one, because that gap is the honest answer: the right interval depends on your tank size, your household, and whether you run a disposal. A single person over a 1,250-gallon tank and a family of six over a 750-gallon tank are not on the same schedule, and no flat rule describes both.

The practical rule that works regardless: have the sludge and scum depths measured at each visit and written down. Two measurements a few years apart tell you your household’s actual rate, which beats every rule of thumb.

What Actually Drives the Price

Tank size, and how full it is. This is the largest single factor and the one the table above tracks. Every gallon removed has to be transported and disposed of at an approved facility, so a 1,500-gallon tank genuinely costs more than a 1,000-gallon one.

Access. If nobody knows where the tank is, or the lids are buried, someone has to find and uncover them before any work starts — on every visit, for the life of the system. A watertight riser installed once removes that permanently. No Tennessee agency publishes a figure for excavation, so be wary of anyone who quotes one to the dollar before seeing your property.

Distance to an approved disposal site. Tennessee rules are strict about where septage may go: a wastewater treatment facility must be used when one is available, and only otherwise may a permitted disposal site be used. Rural properties far from a receiving facility cost more to serve. That driver is real; a precise mileage surcharge is not something we can source.

What the job actually includes. A standard pump-out and a full cleaning are different services at different prices. Agree which one you are buying before the truck arrives, not after.

How to Check Your Pumper Is Actually Permitted

Tennessee regulates the company that empties your tank separately from the system itself, and it is TDEC’s Division of Water Resources that does it — not the Department of Health, which held this role under the old rule numbering. A pumping company must hold an annual Domestic Septage Removal Permit, and operating without one is unlawful under T.C.A. § 68-221-406(a)(5).

You can check the most important part from your driveway. State rules require every pumper vehicle to display, on both sides, the firm’s name and address and its domestic septage removal permit number, in lettering at least two inches high, in bold print, on a contrasting background (0400-48-01-.20). A truck with no permit number on the side is not a compliant septage vehicle.

Two other things worth knowing about that permit. It costs the company $200 a year, expires every 31 December, and is non-transferable — it becomes invalid the moment the business changes hands, so a permit number belonging to a company that has since been sold is not valid. And the local TDEC Environmental Field Office must inspect the truck before the permit issues.

There is also a paper trail you are entitled to rely on. Pumpers must file monthly logs with the department recording the date and address of every collection, the gallons removed, and where the septage was discharged — certified under penalty of law. So “where will my waste go?” has a legally required answer, and the company has to write it down regardless of whether you ask.

Enforcement is worth understanding honestly: a violation is a Class C misdemeanor, which is a small criminal penalty. The meaningful lever is not the fine — it is that TDEC can suspend or revoke the permit and seek an injunction, which ends the business rather than taxing it.

If You Have an Advanced System, the Rules Are Completely Different

Everything above describes conventional septic systems. If you have an aerobic treatment system (ATS) or subsurface drip disposal (SDD), Tennessee imposes real, recurring, enforceable obligations — and this is the single most expensive thing on this page to get wrong.

For an ATS, routine operation and maintenance must be performed at three-month intervals. The manufacturer is required to execute a four-year operation and maintenance contract with the owner of every ATS sold and installed, covering inspections, filter and component repair, service calls and sludge pumping when necessary. The owner must keep a maintenance contract in effect with an approved provider, and TDEC reviews those contracts annually. Participation in web-based monitoring is required for the life of the system.

For subsurface drip disposal the rule is blunter still. The owner at installation “and any subsequent owner, for the life of the system” must have a maintenance contract in effect.

Read that again if you are buying. The obligation does not end at closing — it transfers with the house. A buyer of an ATS or SDD property inherits a quarterly service requirement and an annually reviewed contract that a conventional septic buyer simply does not have. If you are looking at a Tennessee property with an advanced system, the recurring maintenance cost belongs in your budget alongside the mortgage, and you should ask to see the current contract before closing.

Buying or Selling: What Tennessee Actually Requires

Tennessee has no statewide requirement to inspect or pump a septic system when a house changes hands. We found no evidence of a county requiring one either — though with nine counties running their own programs and several publishing little online, that is “no evidence found” rather than a guarantee.

There is one legal duty, and it is narrower than most people assume. Under T.C.A. § 68-221-409(d), in any transfer of residential property of one to four dwelling units with a permitted septic system, the seller must disclose the potential future obligation to connect to the public sewer system. That is the whole requirement. Not the system’s condition, not an inspection, not a pumping history — just the future sewer obligation. It applies whether or not a real estate agent is involved, and the remedies for failing to disclose are the same as under Tennessee’s Residential Property Disclosure Act.

What actually happens in practice is that lenders and buyers request a voluntary, fee-based letter from the county. Several contract counties publish those prices:

Fees are as published by each county and were checked in August 2026. Confirm before budgeting.

What Changed in 2025

Nine Tennessee counties — Blount, Davidson, Hamilton, Jefferson, Knox, Madison, Sevier, Shelby and Williamson — run their own septic programs under contract with TDEC, and may require an additional permit. Those counties can still set rules stricter than the state’s — Tenn. Code Ann. § 68-221-403(a)(10)(B) requires their standards to be at least as stringent as the state’s, and Public Chapter 208, signed April 15, 2025 and effective immediately, did not change that. What it added is a state-level release valve for individual cases. The TDEC commissioner may now issue a variance for a subsurface sewage disposal system inside one of those jurisdictions, and that variance supersedes any more stringent local requirement.

It is narrower than it first sounds, and the limits matter. The variance does not apply to a system serving multiple lots, or to any lot with more than one single-family dwelling plus accessory buildings. And the commissioner may require the variance to be filed and recorded with the county register of deeds — meaning it attaches to the property and will surface in title work when the house is later sold.

If you are in one of those nine counties and a local rule is the obstacle to repairing or replacing your system, a state variance is now a route that did not exist before April 2025. Ask your county environmental health office about it by name.

What a Proper Pump-Out Includes

Agree these before booking rather than after the truck is in the driveway:

The liquid, the scum layer and the settled sludge all removed — not just the liquid skimmed off the top. Compacted solids broken up rather than left behind. Sludge and scum depths measured and told to you, so you know where you stand and when the next visit is genuinely due. The effluent filter, if you have one, rinsed or replaced. A look at the baffles and tank walls while the tank is empty, which is the only time anyone can see them. And confirmation of where the septage is going.

Worth knowing the distinction: a standard pump-out is routine service. A full cleaning adds hydro-jetting of the tank walls and costs more. Most systems need the former, not the latter — so if you are quoted for a cleaning, ask why.

If lid excavation is needed, ask whether it is included or extra. If it is extra, that is the moment to price a riser instead: you pay for the digging once rather than every time.

Sources

Tenn. Comp. R. & Regs. 0400-48-01, Regulations To Govern Subsurface Sewage Disposal Systems (TDEC; effective September 18, 2013, amended April 8, 2014) — particularly .10 (aerobic treatment systems), .13 (maintenance), .15 (subsurface drip disposal), .20 (septic tank pumping contractor), .21 (fees) and .22 (septage disposal). Tennessee Code Annotated §§ 68-221-401 et seq., including § 68-221-406 (unlawful acts), § 68-221-409(d) (transfer disclosure) and § 68-221-413 (penalties). Public Chapter 208, Acts of 2025 (SB 113 / HB 199), approved April 15, 2025. Tennessee Department of Health, Onsite Wastewater Treatment Systems homeowner guidance. TDEC Septic System Construction Permit fee schedule. Knox County Health Department Groundwater Protection fee schedule and FAQ; Hamilton County Division of Groundwater Protection; Sevier County and Jefferson County Environmental Health fee schedules; Metro Nashville Public Health septic system assessments. Verified August 2026.