Well & Septic ProsThrelko Inc.Licensed
| Name | Threlko Inc. |
| License number | OSWWI0319 |
| License type | Licensed Onsite Wastewater Installer - Tier 2 |
| License status | In Effect — on SC DES's OSWW licensed-contractor registry |
| Location | Ninety Six, South Carolina 29666 |
| Phone | (864) 223-5783 |
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What this license covers
- Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.
How to verify this license
We publish this listing exactly as it appears in South Carolina's official licensing records; we do not vouch for the business itself. Before hiring, look up license #OSWWI0319 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: South Carolina DES - OSWW licensed-contractor registry, last checked 2026-08-16. Verify at the official source.
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