| Company | Location | Certifications | License # |
|---|---|---|---|
| AK Septic LLC | Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 03588-OSP |
| Apex Design Group | Wellsville, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02625-OSP |
| Apex Design Group | Wellsville, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 03266-OSP |
| Bear River Health Department | Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 02370-OSP |
| Bear River Health Department | North Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 03011-OSP |
| Bear River Health Dept. | Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 00038-OSP |
| Bear River Health Dept. | Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 00073-OSP |
| Cache County School District | Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02160-OSP |
| Cache County School District | Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02162-OSP |
| Crudbust LLC | North Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04657-OSP |
| Jex Environmental Solutions | Polson, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04135-OSP |
| Jex Environmental Solutions LLC | Nibley, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04225-OSP |
| Jex Environmental Solutions, LLC | Nibley, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 00046-OSP |
| Jex Environmental Solutions, LLC | Nibley, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04090-OSP |
| Mistidawn Ramirez | North Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03706-OSP |
| MTN Edge Excavation | Mendon, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04603-OSP |
| Olsen Septic Service | Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04517-OSP |
| Parker Thompson | Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04579-OSP |
| Richard "Kyle" Jex | Clearfield, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03996-OSP |
| Sunrise Engineering | North Logan, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04561-OSP |
| Teague Beauchamp | Nibley, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03721-OSP |
| White Pine Engineering | Smithfield, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03938-OSP |
22 companies in the Utah DEQ certified onsite wastewater system professionals list are based in Cache County as of 2026-07-23. Companies based elsewhere in Utah also commonly serve the county.
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