GroundRosterLicensed Well and Septic Contractors: Multnomah County, OR
18 licensed well and septic pros based in Multnomah 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 Multnomah County
All 5 towns named on the license records based here, with the number of listings in each, most first.
License classes on the Multnomah 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 18.
| License class | Trade | Listings |
|---|---|---|
| Septic Installer | Septic | 10 |
| Septic Pumper | Septic | 4 |
| Septic Installer & Pumper | Septic | 3 |
| Water Well Constructor | Well | 1 |
Septic Contractors based in Multnomah County (17)
River City Environmental, Inc.
Ranger Excavation, LLC
Priester Properties and Construction LLC
Northwest Portables, dba American Sani-Can
Quality Septic and Excavation LLC
Pro-Pump Sanitation Solutions LLC, dba Pro-Pump
Ai Septic And Excavation LLC
Goodman Sanitation, Inc.
BDL Plumbing , LLC
Gray Water Disposal Service
Kalkhoven Construction, LLC
Environmental Works LLC
JKR Construction, LLC
Ken W Hick
Dirt & Aggregate Interchange, Inc.
Interlaken, Inc.
Rapid Response Bio Clean Inc, dba Synergy Environmental
Water Well Contractors based in Multnomah County (1)
Olsen Well Drilling & PumpLicensed
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Looking for a specific contractor? Search by name, business name, or license number.
Services in Multnomah County, with national cost ranges
Listings based in Multnomah County whose license class covers each service. Cost ranges are national; each links its cost guide.
| Service | Based in Multnomah County | National cost |
|---|---|---|
| Septic Tank Pumping | 7 | $250 to $600 |
| Septic System Installation | 13 | $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 Multnomah 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 Multnomah 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?