| Company | Location | Certifications | License # |
|---|---|---|---|
| Dean Enterprises, L.l.c. Dba Dean Septic Service | Brownsville, WI | Septage Hauler | 2045 |
| Laudolff Septic Services, Llc | Fond Du Lac, WI | Septage Hauler | 1411 |
| Ziegelbauer Septic Service Llc | Malone, WI | Septage Hauler | 602 |
3 companies in the Wisconsin DNR licensed septage hauling businesses are based in Fond Du Lac County as of 2026-07-23. Companies based elsewhere in Wisconsin also commonly serve the county.
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