Operators based within 12 miles of Duncan

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.

Showing the 30 nearest of 92 operators based within 12 miles. The rest are on the county page.

Soil and septic suitability around Duncan

The USDA has already rated this ground for exactly one use: a septic tank absorption field. Within 4 miles of Duncan — 32,004 acres across 30 soil map units — it rates 39.5% of the land very limited for that use and 59% somewhat limited, and almost none with no limitation at all.

• Very limited · 39.5%
• Somewhat limited · 59%
• Not rated · 1.5%

What the limitation actually is

A rating on its own tells you nothing you can act on. The reasons do, and around Duncan the leading one is slope on 28.8% of the mapped area, followed by slow water movement on 16.4%. In full:

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 Duncan. Cecil alone accounts for 63.4% of it.

“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 Duncan (GNIS 2406404, 34.9324, -82.1437), 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: Spartanburg 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

• Septic Tank Pumping in Duncan
• Septic System Repair in Duncan
• Septic Installation in Duncan

Permitting in Spartanburg County

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