| Company | Location | Certifications | License # |
|---|---|---|---|
| Acdc Excavating, Llc | Astoria, OR | Installer | 39172 |
| Blind Slough Logging, Inc., Dba Complete Septic Service | Astoria, OR | InstallerPumper | 37864 |
| Bob Mcewan Construction, Inc. | Seaside, OR | Installer | 37079 |
| Bud'S Excavation Llc | Astoria, OR | Installer | 39459 |
| Ed'S Septic Tank Cleaning Service, Llc | Astoria, OR | InstallerPumper | 34259 |
| Evans Plumbing Inc | Gearhart, OR | InstallerPumper | 39835 |
| Green Mountain Development Llc | Warrenton, OR | Installer | 39327 |
| Hallie Investment Corp., Dba Sweet Septic & Portable Service | Seaside, OR | Pumper | 37303 |
| Kinney & Sons Dump Trucking, Llc | Astoria, OR | Installer | 38893 |
| Osburn-Olson, L.L.C., Dba Ryan Osburn Plumbing Inc | Warrenton, OR | Installer | 38583 |
| Robert Martens Excavation, Ltd., Dba Robert Martens Excavation Ltd | Astoria, OR | Installer | 37547 |
| Rush Development, Llc, Dba North Pacific Excavation | Warrenton, OR | Installer | 38819 |
| Terry'S Plumbing, Llc, Dba Terry'S Septic | Astoria, OR | Pumper | 38979 |
13 companies in the Oregon DEQ licensed Sewage Disposal Service (SDS) installer & pumper businesses are based in Clatsop County as of 2026-07-23. Companies based elsewhere in Oregon also commonly serve the county.
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