SepticRecord

Edgefield County

Septic services in Johnston, South Carolina

Operators based within 12 miles of Johnston

Listed by where the business is, not by who it says it serves. Every operator here was on the SCDES Onsite Wastewater Contractors list on the date its record shows, and the address it is placed by comes from that same list, so this is a checkable claim rather than a service-area promise. A South Carolina licence is issued by the state, not by a county, so operators further out can work here too; these are simply the ones closest to you.

Soil and septic suitability around Johnston

The USDA has already rated this ground for exactly one use: a septic tank absorption field. Within 4 miles of Johnston — 31,996 acres across 92 soil map units — it rates 19.1% of the land very limited for that use and 79.4% somewhat limited, and almost none with no limitation at all.

What the limitation actually is

A rating on its own tells you nothing you can act on. The reasons do, and around Johnston the leading one is depth to saturated zone on 13.9% of the mapped area, followed by slow water movement on 9.8%. In full:

Limiting featureShare of areaWhat it means on site
Depth to saturated zone13.9%A seasonal water table sits too close to the surface
Slow water movement9.8%Water moves through the soil too slowly for a drain field to keep up
Flooding7.3%The site floods often enough to matter
Seepage, bottom layer7.1%The layer beneath the trench is porous enough that effluent could reach groundwater without being filtered
Slope4%The ground is too steep for a conventional field

Shares overlap: most soils here are limited for more than one reason at once, so these do not sum to 98.5%.

The soils themselves

The named soils and land types that make up most of the ground around Johnston. Faceville alone accounts for 20.7% of it.

Soil or land typeShareDrainageSlopeDepth to bedrockSeptic rating
Faceville20.7% Well drained 0 to 10% None in profile Somewhat limited
Herndon14.9% Well drained 2 to 20% None in profile Somewhat limited
Appling12% Well drained 2 to 15% None in profile Somewhat limited
Georgeville7.7% Well drained 2 to 25% None in profile Somewhat limited
Wagram7.4% Well drained 0 to 10% None in profile Somewhat limited

“None in profile” means SSURGO records no bedrock or other restrictive layer within the depth it describes, not that none exists.

Area of interest: a 4-mile radius around the USGS Geographic Names centre point for Johnston (GNIS 2405917, 33.8334, -81.8048), chosen because five of this state's communities are unincorporated and have no boundary to use, and because the lots that need a septic permit are in the ring around a town rather than inside it. Soil from USDA-NRCS Soil Data Access, SSURGO interpretation “ENG - Septic Tank Absorption Fields”, area-weighted by mapped acreage and by each component's share of its map unit. Survey areas: Edgefield County, South Carolina (2025-08-29), Saluda County, South Carolina (2025-08-29). Retrieved 2026-09-18.

This is a survey, not an evaluation of your lot. The permit decision rests on the site evaluation SCDES carries out for the specific parcel.

By service

Permitting in Edgefield County

Septic permitting in Edgefield County is handled by the State of South Carolina, through the Department of Environmental Services, not by the county. See the Edgefield County detail →