Well & Septic ProsProgressive Onsite Septic LLCLicensed
| Name | Progressive Onsite Septic LLC |
| Company | William G Hetzler |
| License number | L4145 |
| License type | SSTS Designer ยท Inspector |
| License status | Current |
| License expires | 2027-02-01 |
| Location | Zimmerman, Minnesota 55398 |
| Phone | (763) 350-0206 |
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What this license covers
- Design: licensed to size and lay out a septic system for a specific site and soil condition.
- 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 Minnesota's official licensing records; we do not vouch for the business itself. Before hiring, look up license #L4145 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: Minnesota Pollution Control Agency (MPCA) - SSTS licensed business list, last checked 2026-08-17. Verify at the official source.
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