Septic services in Williamsburg County, South Carolina

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

Who issues the permit

Agency: South Carolina Department of Environmental Services (SCDES)
Office: Myrtle Beach local office
Address: 927 Shine Avenue, Myrtle Beach, SC 29577
Phone: (843) 238-4378
Rules: S.C. Code Regs. 61-56 (Onsite Wastewater Systems)
Form: D-1740

What permitting costs

The published state fee schedule. These are permitting fees only — they do not include the private soil consultant, the installer, or the excavation, none of which the state sets or publishes.

Item	Fee
Onsite wastewater system application (form D-1740)	$150

Source: SCDES, Septic Tanks: Residential (Single Home Builder). Read 2026-09-18.

Operators based in and around Williamsburg County

The 12 businesses the state's own list records under Williamsburg County, by their published address. A South Carolina licence is issued by the state, not by a county, so operators recorded under a neighbouring county may work here too; each town page below shows the ones nearest to it.