Septic system requirements in North Dakota
What landplan.io applies when it designs a septic system in North Dakota: 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 North Dakota
Reviewed landplan.io designs by North Dakota's own rules, which our staff reviewed against the state's regulations. Last published 5 October 2026.
Septic systems allowed in North Dakota
The system types landplan.io permits in North Dakota:
- Elevated Sand Mound System
- Subsurface Pressure Trench System
- Subsurface Trench System
- Infiltrator Advanced Treatment Leachfield
- Infiltrator Advanced Enviro-Septic® (AES)
- Discharging System
Septic tank size in North Dakota
The daily design flow of a home: 150 gal/day per bedroom, at least 300 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 North Dakota
| From | To | Distance |
|---|---|---|
| Point | Well | 50 Ft |
| Polygon | Building | 10 Ft |
| Polygon | Existing Septic Component to be Abandoned | 5 ft |
| Polygon | Streams, lakes or other surface waters | 100 Ft |
These are the values the landplan.io design engine applies in North Dakota. Confirm a design with the North Dakota health department or your county's before you build.
Parcel data in North Dakota
landplan.io has parcel boundaries for 53 of North Dakota's 53 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 North Dakota
- Septic companies and distributors in North Dakota (7)
- Septic designers in North Dakota
- Septic design jobs in North Dakota
Where the rules come from
The regulations and documents landplan.io's North Dakota rules are read from:
- Private Sewage Disposal Systems (N.D. Admin. Code (NDAC) 62-03.1-03)
- Onsite Wastewater Treatment System Installers Licensing (N.D. Admin. Code (NDAC) 33.1-21-01)
Septic rules by county in North Dakota
- Adams County
- Barnes County
- Benson County
- Billings County
- Bottineau County
- Bowman County
- Burke County
- Burleigh County
- Cass County
- Cavalier County
- Dickey County
- Divide County
- Dunn County
- Eddy County
- Emmons County
- Foster County
- Golden valley County
- Grand forks County
- Grant County
- Griggs County
- Hettinger County
- Kidder County
- Lamoure County
- Logan County
- McHenry County
- Mcintosh County
- Mckenzie County
- McLean County
- Mercer County
- Morton County
- Mountrail County
- Nelson County
- Oliver County
- Pembina County
- Pierce County
- Ramsey County
- Ransom County
- Renville County
- Richland County
- Rolette County
- Sargent County
- Sheridan County
- Sioux County
- Slope County
- Stark County
- Steele County
- Stutsman County
- Towner County
- Traill County
- Walsh County
- Ward County
- Wells County
- Williams County
Questions
What septic systems are allowed in North Dakota?
landplan.io permits these system types in North Dakota: Elevated Sand Mound System, Subsurface Pressure Trench System, Subsurface Trench System, Infiltrator Advanced Treatment Leachfield, Infiltrator Advanced Enviro-Septic® (AES) and Discharging System.
What size septic tank do I need in North Dakota?
landplan.io sizes the septic tank in North Dakota 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 300 gal/day.
How far must a septic system be from a well in North Dakota?
landplan.io keeps these distances in North Dakota: Point to well: 50 Ft.
Does landplan.io have parcel data in North Dakota?
Yes, for 53 of North Dakota's 53 counties.