Septic system requirements in West Virginia

What landplan.io applies when it designs a septic system in West Virginia: the system types allowed, tank sizes, setbacks and soil loading rates, with what septic products cost there.

Updated 5 October 2026

Design a septic system for an address in West Virginia

Reviewed landplan.io designs by West Virginia's own rules, which our staff reviewed against the state's regulations. Last published 5 October 2026.

Septic systems allowed in West Virginia

The system types landplan.io permits in West Virginia:

• Conventional Trench System
• Drip Dispersal System
• Low Pressure Distribution
• Surface Discharging System

Septic tank size in West Virginia

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:

Septic setbacks in West Virginia

These are the values the landplan.io design engine applies in West Virginia. Confirm a design with the West Virginia health department or your county's before you build.

Parcel data in West Virginia

landplan.io has parcel boundaries for 55 of West Virginia's 55 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 West Virginia

• Septic companies and distributors in West Virginia (21)
• Septic designers in West Virginia
• Septic design jobs in West Virginia

Where the rules come from

The regulations and documents landplan.io's West Virginia rules are read from:

• Sewage Treatment and Collection System Design Standards (includes Individual Sewage Systems, Sec. 6) (W. Va. Code R. §64-47 (64CSR47))
• 64CSR9 Sewage Systems (legislative rule, effective 5/1/1998) (W. Va. Code R. 64-9 (64CSR9), sections 64-9-1 to 64-9-14)
• 64CSR47 Table 64-47B Minimum Design Loadings for Sewage Treatment Facilities (W. Va. Code R. 64-47, Table 64-47B)
• 64CSR47 (effective 7/1/2025) Tables 64-47-K, L and M - horizontal separation distances and absorption sizing (transcribed from the filed rule) (W. Va. Code R. 64-47, Tables 64-47-K, 64-47-L, 64-47-M)

Septic rules by county in West Virginia

• Barbour County
• Berkeley County
• Boone County
• Braxton County
• Brooke County
• Cabell County
• Calhoun County
• Clay County
• Doddridge County
• Fayette County
• Gilmer County
• Grant County
• Greenbrier County
• Hampshire County
• Hancock County
• Hardy County
• Harrison County
• Jackson County
• Jefferson County
• Kanawha County
• Lewis County
• Lincoln County
• Logan County
• Marion County
• Marshall County
• Mason County
• Mcdowell County
• Mercer County
• Mineral County
• Mingo County
• Monongalia County
• Monroe County
• Morgan County
• Nicholas County
• Ohio County
• Pendleton County
• Pleasants County
• Pocahontas County
• Preston County
• Putnam County
• Raleigh County
• Randolph County
• Ritchie County
• Roane County
• Summers County
• Taylor County
• Tucker County
• Tyler County
• Upshur County
• Wayne County
• Webster County
• Wetzel County
• Wirt County
• Wood County
• Wyoming County

Questions

What septic systems are allowed in West Virginia?

landplan.io permits these system types in West Virginia: Conventional Trench System, Drip Dispersal System, Low Pressure Distribution and Surface Discharging System.

What size septic tank do I need in West Virginia?

landplan.io sizes the septic tank in West Virginia 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.

Does landplan.io have parcel data in West Virginia?

Yes, for 55 of West Virginia's 55 counties.