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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| G&G Garbage, LLC | Dickinson, ND | Stark | Pumper (Class I) | NDSP007379 |
| Gader Groundworks | Jamestown, ND | — | Installer | — |
| GC Construction | Dickinson, ND | — | Installer | — |
| Gene-O's Septic Tank Service | Minot, ND | Ward | Pumper (Class I) | NDSP007372 |
| Genin LLC | Grenora, ND | — | Installer | — |
| Glacier Enterprises | Horace, ND | — | Installer | — |
| Glacier Oilfield Services, Inc. | Watford City, ND | McKenzie | Pumper (Class I) | NDSP007335 |
| Glasser Excavating, Inc. | Glen Ullin, ND | — | Installer | — |
| Gleason Construction Inc | Devils Lake, ND | — | Installer | — |
| Glen Ullin Park District | Glen Ullin, ND | Morton | Pumper (Class II) | NDSP007345 |
| Go-Fer Sanitation Inc. | Devils Lake, ND | Ramsey | Pumper (Class II) | NDSP007387 |
| Goebel Construction | Williston, ND | — | Installer | — |
| Goulet Construction | Watford City, ND | — | Installer | — |
| Graham-Sons Inc | Cartwright, ND | — | Installer | — |
| Grant Contractors, INC | Alexander, ND | — | Installer | — |
| Great Northern Septic | Crookston, MN | — | Installer | — |
| Great Outdoors Septic | Arvilla, ND | Grand Forks | Pumper (Class I) | NDSP007333 |
| Great Plains Siteworks, Inc. | West Fargo, ND | — | Installer | — |
| Green Brothers Landscaping & Construction | Minot, ND | — | Installer | — |
| Grotte Sanitation | Finley, ND | Steele | Pumper (Class II) | NDSP007321 |
| Gustafson Septic Service Inc | Stanley, ND | Mountrail | Pumper (Class I) | NDSP007306 |
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