| Company | Location | Certifications | License # |
|---|---|---|---|
| Alpha Environmental Services, Inc | Beaverton, OR | InstallerPumper | 39036 |
| Bell Construction Inc., Dba Aloha Sanitary | Hillsboro, OR | InstallerPumper | 37631 |
| Bettinelli Construction, Llc, Dba Bettinelli Excavation | Cornelius, OR | Installer | 39944 |
| Chehalem Ridge Excavating, Llc | Gaston, OR | Installer | 39046 |
| Floz Inc., Dba Floz | Hillsboro, OR | Pumper | 39786 |
| Hollenbach & Hurd, Inc. | Hillsboro, OR | Installer | 38201 |
| Horner Brothers Construction Llc | Hillsboro, OR | Installer | 39797 |
| Hps Construction, Inc. | Cornelius, OR | Installer | 37574 |
| Huson Excavation & Tree Service, Llc | Gales Creek, OR | Installer | 39412 |
| Insight Sanitary Services, Llc | Banks, OR | InstallerPumper | 39270 |
| Integrity, Inc | Banks, OR | Pumper | 39278 |
| Kingdom Construction & Consulting Llc, Dba Insight Sanitary Services | North Plains, OR | InstallerPumper | 39941 |
| On Demand Excavation Llc | Tigard, OR | Installer | 39899 |
| Pihl Inc. | Banks, OR | Installer | 37958 |
| Precision Earthworks, Llc | Beaverton, OR | Installer | 38937 |
| Renner Trucking & Excavating, Inc. | Hillsboro, OR | Installer | 38809 |
| Scott Tankersley Excavation Llc | North Plains, OR | Installer | 39769 |
| Sewer Renewal Specialists Llc, Dba Plumbing & Sewer Renewal Specialists | Tigard, OR | Installer | 39915 |
| Subcom Excavation & Utilities, Llc | Hillsboro, OR | Installer | 38866 |
| Sunrise Portables, Llc | Beaverton, OR | Pumper | 39920 |
| The Excavators Llc | Beaverton, OR | Installer | 39926 |
| Verboort Construction, Llc | Forest Grove, OR | Installer | 37694 |
| West Side Drain Company, Dba Noble Septic Service | Gaston, OR | InstallerPumper | 38783 |
23 companies in the Oregon DEQ licensed Sewage Disposal Service (SDS) installer & pumper businesses are based in Washington County as of 2026-07-23. Companies based elsewhere in Oregon also commonly serve the county.
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