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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| D & D Contracting | Salina, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02131-OSP |
| DAB Concrete | Heber, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 00221-OSP |
| Dale Johnson | Hurricane, UT | Washington | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03046-OSP |
| Dannsco Llc | Wanship, UT | — | Onsite Wastewater Professional (Level 1) | 03161-OSP |
| David Heaton | Nephi, UT | Juab | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04262-OSP |
| David Morgan | Pintura, UT | Washington | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04400-OSP |
| Davis County Health Dept. | Clearfield, UT | Davis | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02766-OSP |
| Davis County Health Dept. | Clearfield, UT | Davis | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03611-OSP |
| DBA Cove Mountain Dirt Worx | Glenwood, UT | Sevier | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04605-OSP |
| Debora Shepard | Kaysville, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04492-OSP |
| Dennis Gunn | Heber City, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04385-OSP |
| Dennis Shumway | Blanding, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04265-OSP |
| Dept of Environmental Quality | Richfield, UT | Sevier | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02103-OSP |
| DEQ District Engineer | Vernal, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03456-OSP |
| Desert Mountain Contractors | Delta, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 00104-OSP |
| Desert Wox Construction | Mona, UT | Juab | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04522-OSP |
| Dirt Dawgs, LLC | Midway, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02880-OSP |
| Donnie Christian Construction | Heber City, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 03173-OSP |
| Drain Works | Altamont, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 03933-OSP |
| Dustin Gaines | Ogden, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04312-OSP |
| Dutco Contracting LLC | Delta, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04140-OSP |
| Dutson Pumping & Septic | Payson, UT | Uintah | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04463-OSP |
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