GroundRosterLicensed Well and Septic Contractors: Columbia County, OR
25 licensed well and septic pros based in Columbia County. Every license number below is sourced from public licensing records, with a link to look it up yourself.
Grouped by the county of the address on each license record, which can be a mailing address, so it doesn't tell you where the business works. When the record names no county, we place it by ZIP code, then town.
Checked against Oregon DEQ - Sewage Disposal Service Licensed Businesses and Oregon Water Resources Department - licensed well constructors. Roster copy last refreshed 2026-08-17.
Towns in Columbia County
All 8 towns named on the license records based here, with the number of listings in each, most first.
License classes on the Columbia County records
Each class as the issuing agency prints it on the license record. A record that names more than one class counts once under each, so the rows can add up to more than 25.
| License class | Trade | Listings |
|---|---|---|
| Septic Installer | Septic | 16 |
| Septic Installer & Pumper | Septic | 4 |
| Septic Pumper | Septic | 4 |
| Water Well Constructor | Well | 1 |
Septic Contractors based in Columbia County (24)
McMullen Water Systems, Inc
Hobby Logging & Construction, Inc.
Clatskanie Septic Service LLC
WB Excavation LLC
St. Helens Scappoose Septic and Drain Service Inc
Lonny Brady
Jobin Construction LLC
Under The Sun LLC
Richard J. Louie
M. E. Moore Const., Inc.
Tjd Solutions INC
K Schwarz Construction, Inc.
Blue Heron Septic & Drain Service, Inc
Waste Connections of Oregon, Inc., dba Hudson Portable Toilet Service
Schwartz General Contracting LLC
Don Hooper, Inc.
Holladay and Sons LLC
Makana Trucking and Excavation, Inc
Hamilton Property Improvement LLC
Earl Scott Pumpouts
Columbia Septic Services LLC
Bergman Construction LLC
4Telney Construction and Trucking LLC
Robert J. Watts Construction Inc.
Water Well Contractors based in Columbia County (1)
Aaron MorleyLicensed
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Looking for a specific contractor? Search by name, business name, or license number.
Services in Columbia County, with national cost ranges
Listings based in Columbia County whose license class covers each service. Cost ranges are national; each links its cost guide.
| Service | Based in Columbia County | National cost |
|---|---|---|
| Septic Tank Pumping | 8 | $250 to $600 |
| Septic System Installation | 20 | $3,600 to $12,500 |
| Septic Inspection | 0 | $150 to $900 |
| Septic System Design | 0 | Varies by site |
| Perc Test and Soil Evaluation | 0 | $250 to $1,000 |
| Well Drilling | 1 | $5,500 to $35,000 |
| Well Pump Repair | 0 | $1,000 to $2,500 |
None of the listings based in Columbia County hold a license class we can match to septic inspection, septic system design, perc test and soil evaluation or well pump repair. Ask any contractor whether they do this work, or try a nearby city.
Hiring a well and septic professional in Columbia County
Before you sign anything: confirm the license on this page is still active with the agency that issued it, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.
Do I need a permit for well or septic work in Oregon?