Septic system requirements in Manassas County, Virginia
The septic rules landplan.io applies in Manassas County, what a septic tank costs there, and the parcel data we hold.
Updated
Design a septic system for an address in Manassas County
Virginia's state rules apply in Manassas County: landplan.io has no county rules of its own here. State rules: Reviewed See Virginia's rules
Septic systems allowed in Manassas County
The system types landplan.io permits in Manassas County:
- Mounded Leaching System
- Drip Dispersal System
- Low Pressure Trenches
- Trenches System
- Infiltrator Advanced Treatment Leachfield (ATL)
- Infiltrator Advanced Enviro-Septic® (AES)
- Discharging System
Septic tank size in Manassas 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 Manassas County
| From | To | Distance |
|---|---|---|
| Polygon | Existing Septic Component to be Abandoned | 5 ft |
| Polygon | Wetland | 5 Ft |
These are the values the landplan.io design engine applies in Manassas County. Confirm a design with the Virginia health department or your county's before you build.
Septic companies, designers and jobs in Virginia
- Septic companies and distributors in Virginia
- Septic designers in Virginia
- Septic design jobs in Virginia
Where the rules come from
The regulations and documents landplan.io's Manassas County, Virginia rules are read from:
- Sewage Handling and Disposal Regulations (12VAC5-610)
- Regulations for Alternative Onsite Sewage Systems (12VAC5-613), full chapter (12VAC5-613-10 to 12VAC5-613-210)
- Sewage Handling and Disposal Regulations (12VAC5-610), sections 591-597 with Tables 4.1-4.4 (LIS text) (12VAC5-610-591 to 12VAC5-610-597, Tables 4.1, 4.2, 4.3 and 4.4)
- Alternative Discharging Sewage Treatment Regulations for Individual Single Family Dwellings (12VAC5-640), full chapter (12VAC5-640-5 to 12VAC5-640-520)
- Sewage Handling and Disposal Regulations (12VAC5-610), VDH copy with Tables 4.1 and 4.2 (setback distances, pp.57-58) (12VAC5-610-592, Tables 4.1 and 4.2)
Near Manassas County
- Manassas park County
- Prince William County
- Fairfax County
- Fauquier County
- Falls church County
- Alexandria County
- Arlington County
- Stafford County
- All of Virginia
Questions
What septic systems are allowed in Manassas County?
landplan.io designs by Virginia's state rules there and permits: Mounded Leaching System, Drip Dispersal System, Low Pressure Trenches, Trenches System, Infiltrator Advanced Treatment Leachfield (ATL), Infiltrator Advanced Enviro-Septic® (AES) and Discharging System.
What size septic tank do I need in Manassas County?
landplan.io sizes the septic tank in Manassas 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.