Septic system requirements in New castle County, Delaware
The septic rules landplan.io applies in New castle County, what a septic tank costs there, and the parcel data we hold.
Updated
Design a septic system for an address in New castle County
Delaware's state rules apply in New castle County: landplan.io has no county rules of its own here. State rules: Reviewed See Delaware's rules
Septic systems allowed in New castle County
The system types landplan.io permits in New castle County:
- Elevated Sand Mound System
- Low Pressure Pipe System
- Conventional Trench System
- Subsurface Micro Irrigation
- Capping Fill Gravity
- Capping Fill Low Pressure Pipe
- Spray Irrigation System
- Infiltrator Advanced Treatment Leachfield (ATL)
- Infiltrator Advanced Enviro-Septic® (AES)
- Discharging System
Septic tank size in New castle County
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 New castle County
| From | To | Distance |
|---|---|---|
| Polygon | Existing Septic Component to be Abandoned | 5 ft |
These are the values the landplan.io design engine applies in New castle County. Confirm a design with the Delaware health department or your county's before you build.
Parcel data in New castle County
landplan.io has parcel boundaries for New castle County (99.9% of its area): type an address and the design starts from the parcel.
Septic companies, designers and jobs in Delaware
- Septic companies and distributors in Delaware
- Septic designers in Delaware
- Septic design jobs in Delaware
Where the rules come from
The regulations and documents landplan.io's New castle County, Delaware rules are read from:
- Regulations Governing the Design, Installation and Operation of On-Site Wastewater Treatment and Disposal Systems (7 Del. Admin. Code 7101)
- 7101 Regulations Governing the Design, Installation and Operation of On-Site Wastewater Treatment and Disposal Systems, with Exhibits A-NN (Exhibit C, Minimum Isolation Distances, p.173-174) (7 Del. Admin. Code 7101, Exhibit C)
Near New castle County
Questions
What septic systems are allowed in New castle County?
landplan.io designs by Delaware's state rules there and permits: Elevated Sand Mound System, Low Pressure Pipe System, Conventional Trench System, Subsurface Micro Irrigation, Capping Fill Gravity, Capping Fill Low Pressure Pipe, Spray Irrigation System, Infiltrator Advanced Treatment Leachfield (ATL), Infiltrator Advanced Enviro-Septic® (AES) and Discharging System.
What size septic tank do I need in New castle County?
landplan.io sizes the septic tank in New castle 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 120 gal/day per bedroom, at least 240 gal/day.
Does landplan.io have parcel data for New castle County, Delaware?
Yes: parcel boundaries cover New castle County (99.9% of its area).