Septic system requirements in Kansas
What landplan.io applies when it designs a septic system in Kansas: 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 Kansas
Reviewed landplan.io designs by Kansas's own rules, which our staff reviewed against the state's regulations. Last published 5 October 2026.
Septic systems allowed in Kansas
The system types landplan.io permits in Kansas:
- Mound System
- Conventional Trench System
- Subsurface Drip Dispersal (SDD) System
- Low Pressure Distribution
- In-Ground Bed
- In-Ground Bed Pressure Distribution
- At Grade Distribution
- Surface Discharging System
Septic tank size in Kansas
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 Kansas
| From | To | Distance |
|---|---|---|
| LineString | Private Water Line | 10 ft |
| LineString | Public Water Line | 25 ft |
| LineString | Watercourse (river, stream, etc) | 50 ft |
| Point | Public Well | 100 ft |
| Polygon | Building (foundation) | 20 ft |
| Polygon | Existing Septic Component to be Abandoned | 5 ft |
| Polygon | Surface Water | 50 ft |
Soil loading rates in Kansas
| Table | Lowest | Highest | Soil groups |
|---|---|---|---|
| Soil Loading Rate | 0.25 gal/day/ft² | 1.1 gal/day/ft² | 13 |
landplan.io picks the rate from the soil test: texture, structure and percolation.
These are the values the landplan.io design engine applies in Kansas. Confirm a design with the Kansas health department or your county's before you build.
Parcel data in Kansas
landplan.io has parcel boundaries for 60 of Kansas's 105 counties: the counties where 90.5% of the state's people live. Type an address there and the design starts from the parcel.
Septic companies, designers and jobs in Kansas
- Septic companies and distributors in Kansas (30)
- Septic designers in Kansas
- Septic design jobs in Kansas
Where the rules come from
The regulations and documents landplan.io's Kansas rules are read from:
- Sewage and Excreta Disposal (K.A.R. 28-5-1 to 28-5-9)
- Bulletin 4-2 (March 1997) - Minimum Standards for Design and Construction of Onsite Wastewater Systems (full bulletin with Table 5, separation distances) (KDHE Bulletin 4-2, Table 5)
- Bulletin 4-2: Minimum Standards for Design and Construction of Onsite Wastewater Systems (KDHE Bulletin 4-2 (incorporated by reference via K.A.R. 28-5 county sanitary code procedure))
Septic rules by county in Kansas
- Allen County
- Anderson County
- Atchison County
- Barber County
- Barton County
- Bourbon County
- Brown County
- Butler County
- Chase County
- Chautauqua County
- Cherokee County
- Cheyenne County
- Clark County
- Clay County
- Cloud County
- Coffey County
- Comanche County
- Cowley County
- Crawford County
- Decatur County
- Dickinson County
- Doniphan County
- Douglas County
- Edwards County
- Elk County
- Ellis County
- Ellsworth County
- Finney County
- Ford County
- Franklin County
- Geary County
- Gove County
- Graham County
- Grant County
- Gray County
- Greeley County
- Greenwood County
- Hamilton County
- Harper County
- Harvey County
- Haskell County
- Hodgeman County
- Jackson County
- Jefferson County
- Jewell County
- Johnson County
- Kearny County
- Kingman County
- Kiowa County
- Labette County
- Lane County
- Leavenworth County
- Lincoln County
- Linn County
- Logan County
- Lyon County
- Marion County
- Marshall County
- Mcpherson County
- Meade County
- Miami County
- Mitchell County
- Montgomery County
- Morris County
- Morton County
- Nemaha County
- Neosho County
- Ness County
- Norton County
- Osage County
- Osborne County
- Ottawa County
- Pawnee County
- Phillips County
- Pottawatomie County
- Pratt County
- Rawlins County
- Reno County
- Republic County
- Rice County
- Riley County
- Rooks County
- Rush County
- Russell County
- Saline County
- Scott County
- Sedgwick County
- Seward County
- Shawnee County
- Sheridan County
- Sherman County
- Smith County
- Stafford County
- Stanton County
- Stevens County
- Sumner County
- Thomas County
- Trego County
- Wabaunsee County
- Wallace County
- Washington County
- Wichita County
- Wilson County
- Woodson County
- Wyandotte County
Questions
What septic systems are allowed in Kansas?
landplan.io permits these system types in Kansas: Mound System, Conventional Trench System, Subsurface Drip Dispersal (SDD) System, Low Pressure Distribution, In-Ground Bed, In-Ground Bed Pressure Distribution, At Grade Distribution and Surface Discharging System.
What size septic tank do I need in Kansas?
landplan.io sizes the septic tank in Kansas 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.
How far must a septic system be from a well in Kansas?
landplan.io keeps these distances in Kansas: Point to public well: 100 ft.
Does landplan.io have parcel data in Kansas?
Yes, for 60 of Kansas's 105 counties.