Septic system requirements in Tennessee
What landplan.io applies when it designs a septic system in Tennessee: the system types allowed, tank sizes, setbacks and soil loading rates, with what septic products cost there.
Updated
Design a septic system for an address in Tennessee
Reviewed landplan.io designs by Tennessee's own rules, which our staff reviewed against the state's regulations. Last published 5 October 2026.
Septic systems allowed in Tennessee
The system types landplan.io permits in Tennessee:
- Elevated Sand Mound System
- Low Pressure Pipe System
- Conventional Trench System
- Infiltrator Advanced Treatment Leachfield (ATL)
- Infiltrator Advanced Enviro-Septic® (AES)
- Discharging System
Septic tank size in Tennessee
The daily design flow of a home: 120 gal/day per bedroom, at least 240 gal/day. The septic tank is sized from that flow:
| Daily design flow | Minimum tank |
|---|---|
| up to 240 gal/day | 1,000 gallons |
| 240 to 360 gal/day | 1,500 gallons |
| 360 to 600 gal/day | 2,000 gallons |
| 600 to 720 gal/day | 2,500 gallons |
| 720 to 840 gal/day | 2,750 gallons |
| 840 to 920 gal/day | 3,000 gallons |
| 920 to 1,040 gal/day | 3,250 gallons |
Septic setbacks in Tennessee
| From | To | Distance |
|---|---|---|
| Polygon | Existing Septic Component to be Abandoned | 5 ft |
These are the values the landplan.io design engine applies in Tennessee. Confirm a design with the Tennessee health department or your county's before you build.
Parcel data in Tennessee
landplan.io has parcel boundaries for 94 of Tennessee's 95 counties: the counties where 93% of the state's people live. Type an address there and the design starts from the parcel.
Septic companies, designers and jobs in Tennessee
- Septic companies and distributors in Tennessee (25)
- Septic designers in Tennessee
- Septic design jobs in Tennessee
Where the rules come from
The regulations and documents landplan.io's Tennessee rules are read from:
Septic rules by county in Tennessee
- Anderson County
- Bedford County
- Benton County
- Bledsoe County
- Blount County
- Bradley County
- Campbell County
- Cannon County
- Carroll County
- Carter County
- Cheatham County
- Chester County
- Claiborne County
- Clay County
- Cocke County
- Coffee County
- Crockett County
- Cumberland County
- Davidson County
- Decatur County
- Dekalb County
- Dickson County
- Dyer County
- Fayette County
- Fentress County
- Franklin County
- Gibson County
- Giles County
- Grainger County
- Greene County
- Grundy County
- Hamblen County
- Hamilton County
- Hancock County
- Hardeman County
- Hardin County
- Hawkins County
- Haywood County
- Henderson County
- Henry County
- Hickman County
- Houston County
- Humphreys County
- Jackson County
- Jefferson County
- Johnson County
- Knox County
- Lake County
- Lauderdale County
- Lawrence County
- Lewis County
- Lincoln County
- Loudon County
- Macon County
- Madison County
- Marion County
- Marshall County
- Maury County
- Mcminn County
- Mcnairy County
- Meigs County
- Monroe County
- Montgomery County
- Moore County
- Morgan County
- Obion County
- Overton County
- Perry County
- Pickett County
- Polk County
- Putnam County
- Rhea County
- Roane County
- Robertson County
- Rutherford County
- Scott County
- Sequatchie County
- Sevier County
- Shelby County
- Smith County
- Stewart County
- Sullivan County
- Sumner County
- Tipton County
- Trousdale County
- Unicoi County
- Union County
- Van buren County
- Warren County
- Washington County
- Wayne County
- Weakley County
- White County
- Williamson County
- Wilson County
Questions
What septic systems are allowed in Tennessee?
landplan.io permits these system types in Tennessee: Elevated Sand Mound System, Low Pressure Pipe System, Conventional Trench System, Infiltrator Advanced Treatment Leachfield (ATL), Infiltrator Advanced Enviro-Septic® (AES) and Discharging System.
What size septic tank do I need in Tennessee?
landplan.io sizes the septic tank in Tennessee from the daily design flow: up to 240 gal/day: 1,000 gallons; 240 to 360 gal/day: 1,500 gallons; 360 to 600 gal/day: 2,000 gallons; larger flows need larger tanks. A home's design flow is 120 gal/day per bedroom, at least 240 gal/day.
Does landplan.io have parcel data in Tennessee?
Yes, for 94 of Tennessee's 95 counties.