8 providers on record in Washington County. For the recorded septic documents themselves, see septic records for Washington County, Oregon.
| Company | City | Phone | Rating |
|---|---|---|---|
| NW Tank Lining & Inspection | Tigard | (503) 673-2042 | 5.0 (1) |
| PDX Sewer Solutions | Portland | (971) 200-9090 | 4.4 (5) |
| West Side Drain | Hillsboro | (503) 522-2727 | 4.2 (36) |
| Precision Earthworks | Hillsboro | (503) 268-1767 | 4.1 (7) |
| 7 Pines Plumbing | Sherwood | (971) 381-0157 | 3.7 (12) |
| Alpha Environmental Services | Beaverton | (503) 676-6327 | 3.3 (37) |
| Noble Sanitary Service | Forest Grove | (503) 648-8246 | 3.0 (5) |
| Duane Snyder Plumbing & Remodeling LLC | Tigard | (503) 720-8853 | — |
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