Operators based within 12 miles of Irmo

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 Irmo

The USDA has already rated this ground for exactly one use: a septic tank absorption field. Within 4 miles of Irmo — 31,998 acres across 49 soil map units — it rates 43.2% of the land very limited for that use and 45.1% somewhat limited, and almost none with no limitation at all.

• Very limited · 43.2%
• Somewhat limited · 45.1%
• Not rated · 11.7%

What the limitation actually is

A rating on its own tells you nothing you can act on. The reasons do, and around Irmo the leading one is depth to bedrock on 44% of the mapped area, followed by slope on 16.5%. In full:

Shares overlap: most soils here are limited for more than one reason at once, so these do not sum to 88.3%.

The soils themselves

The named soils and land types that make up most of the ground around Irmo. Nanford alone accounts for 30% 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 Irmo (GNIS 2405893, 34.1026, -81.1959), 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: Lexington County, South Carolina (2025-08-29), Richland 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 Irmo
• Septic System Repair in Irmo
• Septic Installation in Irmo

Permitting in Lexington County

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