Septic system requirements in Ohio
What landplan.io applies when it designs a septic system in Ohio: 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 Ohio
Reviewed landplan.io designs by Ohio's own rules, which our staff reviewed against the state's regulations. Last published 5 October 2026.
Septic systems allowed in Ohio
The system types landplan.io permits in Ohio:
- Mounded Leaching System
- Spray Distribution System
- Low Pressure Pipe System
- Drip Distribution System
- Leaching Trench System
- Infiltrator Advanced Treatment Leachfield (ATL)
- Infiltrator Advanced Enviro-Septic® (AES)
- Discharging System
Septic tank size in Ohio
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 Ohio
| From | To | Distance |
|---|---|---|
| LineString | Fence Line | 5 Ft |
| LineString | Gas Line | 10 Ft |
| LineString | Geothermal horizontal closed loop systems | 10 Ft |
| LineString | Grey water recycling system | 10 Ft |
| LineString | Intermittent stream | 10 Ft |
| LineString | Irrigation lines | 10 Ft |
| LineString | Perennial stream | 50 Ft |
| LineString | Property Line or Right-of-way | 10 Ft |
| LineString | River | 50 Ft |
| LineString | Road cut-banks or stream cut-banks | 50 Ft |
| LineString | Swales | 10 Ft |
| LineString | Utility Service Line | 10 Ft |
| LineString | Vertical open and closed loop geothermal heating and/or cooling system | 50 Ft |
| LineString | Water Supply Source | 50 Ft |
| Point | Sealed well | 10 Ft |
| Polygon | Buildings or other structures | 10 Ft |
| Polygon | Driveway or other Hardscape | 10 Ft |
| Polygon | Existing Septic Component to be Abandoned | 5 ft |
| Polygon | Lake | 50 Ft |
| Polygon | Recorded easements | 10 Ft |
| Polygon | Roadway or Surface | 10 Ft |
| Polygon | Surface water impoundment | 50 Ft |
| Polygon | Wetland | 50 Ft |
These are the values the landplan.io design engine applies in Ohio. Confirm a design with the Ohio health department or your county's before you build.
Septic system costs in Ohio
| Product | Median | Typical range | Listings |
|---|---|---|---|
| Aeration Tank | $7,235 | $6,044 – $9,015 | 17 |
| Control Panel | $650 | $500 – $1,213 | 12 |
| Dose Tank | $1,895 | $1,597 – $2,199 | 78 |
| Gravel | $15 | $15 – $15 | 94 |
| Pump | $600 | $332 – $1,020 | 49 |
| Sand | $9 | $9 – $9 | 43 |
| Septic Tank | $2,051 | $1,835 – $2,480 | 79 |
| Spray Head | $350 | $350 – $400 | 5 |
The Ohio price index: every product type, month by month.
Parcel data in Ohio
landplan.io has parcel boundaries for 88 of Ohio's 88 counties: the counties where 100% of the state's people live. Type an address there and the design starts from the parcel.
Septic companies, designers and jobs in Ohio
Where the rules come from
The regulations and documents landplan.io's Ohio rules are read from:
- Chapter 3701-29 - Sewage Treatment Systems (Household/Small Flow On-Site Sewage Treatment Systems) (Ohio Admin. Code Chapter 3701-29)
- Rule 3701-29-15 General soil absorption standards (with Table 3 Soil Infiltration Loading Rates and Table 4 Hydraulic Linear Loading Rate Table) (Ohio Adm.Code 3701-29-15)
- Rule 3701-29-15 Appendix B - Sand mound (Ohio Adm.Code 3701-29-15, Appendix B)
- Rule 3745-9-04 Well siting (public water system well sanitary isolation radius) (Ohio Adm.Code 3745-9-04)
- Rule 3701-29-15 Appendix C - Drip distribution systems (Ohio Adm.Code 3701-29-15, Appendix C)
- Rule 3701-29-15 Appendix A - Technical standards for use of leaching trenches for soil absorption (Ohio Adm.Code 3701-29-15, Appendix A)
- Tanks Approved for use in Sewage Treatment Systems (Approval Chart of Septic Tanks) (ODH tank approval chart, updated 9/28/2026)
- Tangent - Tangent LandSaver MBR Plastic Tank up to 600 Gallon approval (ODH Pretreatment Components)
- Infiltrator Water Technologies - Presby AES Approval Chart (ODH Pretreatment Components)
- Premier Tech - Premier Tech Aqua Ecoflo Coco Filter Approval Chart (ODH Pretreatment Components)
- Infiltrator Water Technologies - Infiltrator ATL Approval Chart (ODH Pretreatment Components)
- IMET Corporation - IMET Corporation Approval Chart (ODH Pretreatment Components)
Septic rules by county in Ohio
- Adams County
- Allen County
- Ashland County
- Ashtabula County
- Athens County
- Auglaize County
- Belmont County
- Brown County
- Butler County
- Carroll County
- Champaign County
- Clark County
- Clermont County
- Clinton County
- Columbiana County
- Coshocton County
- Crawford County
- Cuyahoga County
- Darke County
- Defiance County
- Delaware County
- Erie County
- Fairfield County
- Fayette County
- Franklin County
- Fulton County
- Gallia County
- Geauga County
- Greene County
- Guernsey County
- Hamilton County
- Hancock County
- Hardin County
- Harrison County
- Henry County
- Highland County
- Hocking County
- Holmes County
- Huron County
- Jackson County
- Jefferson County
- Knox County
- Lake County
- Lawrence County
- Licking County
- Logan County
- Lorain County
- Lucas County
- Madison County
- Mahoning County
- Marion County
- Medina County
- Meigs County
- Mercer County
- Miami County
- Monroe County
- Montgomery County
- Morgan County
- Morrow County
- Muskingum County
- Noble County
- Ottawa County
- Paulding County
- Perry County
- Pickaway County
- Pike County
- Portage County
- Preble County
- Putnam County
- Richland County
- Ross County
- Sandusky County
- Scioto County
- Seneca County
- Shelby County
- Stark County
- Summit County
- Trumbull County
- Tuscarawas County
- Union County
- Van Wert County
- Vinton County
- Warren County
- Washington County
- Wayne County
- Williams County
- Wood County
- Wyandot County
Questions
What septic systems are allowed in Ohio?
landplan.io permits these system types in Ohio: Mounded Leaching System, Spray Distribution System, Low Pressure Pipe System, Drip Distribution System, Leaching Trench System, Infiltrator Advanced Treatment Leachfield (ATL), Infiltrator Advanced Enviro-Septic® (AES) and Discharging System.
What size septic tank do I need in Ohio?
landplan.io sizes the septic tank in Ohio 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.
How far must a septic system be from a well in Ohio?
landplan.io keeps these distances in Ohio: Point to sealed well: 10 Ft.
How much does a septic tank cost in Ohio?
The median delivered aeration tank in Ohio cost $7,235 in October 2026; most sold between $6,044 and $9,015, from 17 distributors' listings on landplan.io. Installation is extra.
Does landplan.io have parcel data in Ohio?
Yes, for 88 of Ohio's 88 counties.