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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Gaitlan Knudson-Hammon | Panguitch, UT | Garfield | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04497-OSP |
| Gem Engineering, Inc. | Cedar City, UT | Iron | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 02135-OSP |
| GEM Engineering, Inc. | Cedar City, UT | Iron | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 02971-OSP |
| GeoStrata Engineering & Geosciences | Bluffdale, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04105-OSP |
| Geotechnical and Environmental Services, INC. | Hurricane, UT | Washington | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04445-OSP |
| Geotechnical Testing Services, Inc. | St. George, UT | Washington | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 03287-OSP |
| Gilson Engineering | Draper, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04537-OSP |
| Glazier Construction | Vernal, UT | Uintah | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 02500-OSP |
| Go2 Pumpers LLC | South Jordan, UT | — | Onsite Wastewater Professional (Level 1) | 04632-OSP |
| Gordon Geotechnical Engineering | Salt Lake City, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 03576-OSP |
| GORVA Excavating | Mona, UT | — | Onsite Wastewater Professional (Level 1) | 04630-OSP |
| Grant Turpin | Tooele, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04260-OSP |
| Great Basin Engineering | South Ogden, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04450-OSP |
| Great Basin Engineering Inc. | Ogden, UT | Washington | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 00435-OSP |
| GreenRidge Services LLC | Heber City, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04488-OSP |
| GRS Group an NV5 Company | Vernal, UT | Uintah | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04142-OSP |
| GSH Geotechnical | Salt Lake City, UT | — | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 00187-OSP |
| Gts | St. George, UT | Washington | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03086-OSP |
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