Septic system requirements in Riley County, Kansas
The septic rules landplan.io applies in Riley County, what a septic tank costs there, and the parcel data we hold.
Updated
Design a septic system for an address in Riley County
Kansas's state rules apply in Riley County: landplan.io has no county rules of its own here. State rules: Reviewed See Kansas's rules
Septic systems allowed in Riley County
The system types landplan.io permits in Riley County:
- 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 Riley County
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 Riley County
| 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 Riley County
| 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 Riley County. Confirm a design with the Kansas health department or your county's before you build.
Parcel data in Riley County
landplan.io has parcel boundaries for Riley County (100% of its area): type an address and the design starts from the parcel.
Septic companies, designers and jobs in Kansas
Where the rules come from
The regulations and documents landplan.io's Riley County, 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))
Near Riley County
- Geary County
- Pottawatomie County
- Clay County
- Marshall County
- Wabaunsee County
- Dickinson County
- Washington County
- Morris County
- All of Kansas
Questions
What septic systems are allowed in Riley County?
landplan.io designs by Kansas's state rules there and permits: 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 Riley County?
landplan.io sizes the septic tank in Riley County 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 Riley County?
landplan.io keeps these distances in Riley County: Point to public well: 100 ft.
Does landplan.io have parcel data for Riley County, Kansas?
Yes: parcel boundaries cover Riley County (100% of its area).