Septic system requirements in Kentucky
What landplan.io applies when it designs a septic system in Kentucky: 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 Kentucky
Reviewed landplan.io designs by Kentucky's own rules, which our staff reviewed against the state's regulations. Last published 5 October 2026.
Septic systems allowed in Kentucky
The system types landplan.io permits in Kentucky:
- Conventional Trench System
- Drip Dispersal System
- Low Pressure Distribution
- Surface Discharging System
Septic tank size in Kentucky
The daily design flow of a home: 150 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 Kentucky
| From | To | Distance |
|---|---|---|
| Polygon | Existing Septic Component to be Abandoned | 5 ft |
These are the values the landplan.io design engine applies in Kentucky. Confirm a design with the Kentucky health department or your county's before you build.
Septic companies, designers and jobs in Kentucky
- Septic companies and distributors in Kentucky (11)
- Septic designers in Kentucky
- Septic design jobs in Kentucky
Where the rules come from
The regulations and documents landplan.io's Kentucky rules are read from:
Septic rules by county in Kentucky
- Adair County
- Allen County
- Anderson County
- Ballard County
- Barren County
- Bath County
- Bell County
- Boone County
- Bourbon County
- Boyd County
- Boyle County
- Bracken County
- Breathitt County
- Breckinridge County
- Bullitt County
- Butler County
- Caldwell County
- Calloway County
- Campbell County
- Carlisle County
- Carroll County
- Carter County
- Casey County
- Christian County
- Clark County
- Clay County
- Clinton County
- Crittenden County
- Cumberland County
- Daviess County
- Edmonson County
- Elliott County
- Estill County
- Fayette County
- Fleming County
- Floyd County
- Franklin County
- Fulton County
- Gallatin County
- Garrard County
- Grant County
- Graves County
- Grayson County
- Green County
- Greenup County
- Hancock County
- Hardin County
- Harlan County
- Harrison County
- Hart County
- Henderson County
- Henry County
- Hickman County
- Hopkins County
- Jackson County
- Jefferson County
- Jessamine County
- Johnson County
- Kenton County
- Knott County
- Knox County
- Larue County
- Laurel County
- Lawrence County
- Lee County
- Leslie County
- Letcher County
- Lewis County
- Lincoln County
- Livingston County
- Logan County
- Lyon County
- Madison County
- Magoffin County
- Marion County
- Marshall County
- Martin County
- Mason County
- McCracken County
- Mccreary County
- McLean County
- Meade County
- Menifee County
- Mercer County
- Metcalfe County
- Monroe County
- Montgomery County
- Morgan County
- Muhlenberg County
- Nelson County
- Nicholas County
- Ohio County
- Oldham County
- Owen County
- Owsley County
- Pendleton County
- Perry County
- Pike County
- Powell County
- Pulaski County
- Robertson County
- Rockcastle County
- Rowan County
- Russell County
- Scott County
- Shelby County
- Simpson County
- Spencer County
- Taylor County
- Todd County
- Trigg County
- Trimble County
- Union County
- Warren County
- Washington County
- Wayne County
- Webster County
- Whitley County
- Wolfe County
- Woodford County
Questions
What septic systems are allowed in Kentucky?
landplan.io permits these system types in Kentucky: Conventional Trench System, Drip Dispersal System, Low Pressure Distribution and Surface Discharging System.
What size septic tank do I need in Kentucky?
landplan.io sizes the septic tank in Kentucky 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 150 gal/day per bedroom, at least 240 gal/day.