| Company | Location | Certifications | License # |
|---|---|---|---|
| A&D Jensen Contractors | Richfield, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03631-OSP |
| AEMT Septic | Joseph, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 03031-OSP |
| Blaine Breinholt | Richfield, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 00005-OSP |
| Brazil Contracting LLC. | Salina, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 03683-OSP |
| Central Utah Health Dept. | Richfield, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02670-OSP |
| DBA Cove Mountain Dirt Worx | Glenwood, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04605-OSP |
| Dept of Environmental Quality | Richfield, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02103-OSP |
| Ensign Engineering | Central Valley, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04270-OSP |
| Jason Bagley | Monroe, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03811-OSP |
| Jones & DeMille Engineering, Inc. | Richfield, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 00289-OSP |
| Olcott & Sons Inc | Venice, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02395-OSP |
| RiverStone Contractors Inc. | Glenwood, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 03596-OSP |
12 companies in the Utah DEQ certified onsite wastewater system professionals list are based in Sevier County as of 2026-07-23. Companies based elsewhere in Utah also commonly serve the county.
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