GroundRosterWilthom LLCLicensed
| Name | Wilthom LLC |
| License number | 39123 (installer), 51449 (inspector), 51450 (inspector) |
| License type | Onsite Wastewater Installer - Basic · Onsite Soil Evaluator · Onsite System Inspector |
| License status | Current registration |
| License expires | 2028-02-29 |
| Location | Neosho, Missouri |
| Service area | Barry, Jasper, Lawrence, McDonald, Newton |
| Phone | (417) 592-0727 |
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What this license covers
- Site testing: licensed to run percolation tests and evaluate soils to determine what kind of system a site can support.
- Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.
- Inspection: licensed to inspect existing septic systems; the license you want for a home-purchase inspection.
How to verify this license
We publish this listing exactly as it appears in Missouri's official licensing records; we do not vouch for the business itself. Before hiring, look up license #39123 (installer), 51449 (inspector), 51450 (inspector) directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: Missouri registered onsite wastewater treatment system (OWTS) installers + Missouri registered onsite soil evaluators + Missouri licensed onsite system inspectors/evaluators, last checked 2026-08-16. Verify at the official source.
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