Licensed Septic Companies in Multnomah County, OR
44 septic companies serve Multnomah County, Oregon, and 39 of them hold a Oregon septic license or certification matched to the Oregon Department of Environmental Quality list (data as of October 2026).
Septic services in Multnomah County
Guides: Septic tank pumping · Septic system installation · Septic inspection · Septic repair · Drain field repair · Aerobic septic systems · Installation cost · Pumping cost
44 septic companies in Multnomah County
Portland 18
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Danielson Contractors Inc
5106 SE 99th Ave, Portland, OR 97266
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #969 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Golden Eagle Excavator, LLC
17007 SE Stephens St, Portland, OR 97233
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #950 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Iron River Washrooms LLC
15100 NE Glisan St, Portland, OR 97230
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3988 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Kenneth Hick
PO Box 16756, Portland, OR 97292
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1074 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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NW Excavation & Construction
16731 NE Wasco St., Portland, OR 97230
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3452 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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PLUUM Construction
8449 SW Barbur Blvd, Portland, OR 97219
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3966 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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River City Environmental
5410 NE 109th Ave, Portland, OR 97294
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1203 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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River City Environmental
PO Box 30087, Portland, OR 97294
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3470 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3468 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3472 (Oregon Department of Environmental Quality, verify)
- +2 more credentials
Per state license: Installation
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River City Environmental
PO Box 30087, Portland, OR 97294
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #4022 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3968 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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River City Environmental
PO Box 30087, Portland, OR 97294
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1190 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Superior Underground LLC
PO Box 20097, Portland, OR 97294
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #4002 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Twin Peaks Construction Inc
12119 SE Henderson Dr, Portland, OR 97266
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3701 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Wolf Dog Construction LLC
12950 SE Powell Blvd, Portland, OR 97236
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #731 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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A Advanced Pumping
5410 NE 109th Ave #440, Portland, OR 97220
From their website: Pumping · Installation · Inspection · Drain field · Perc testing
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Proline Plumbing
8023 SE Martins Ct St, Portland, OR 97206
From their website: Pumping · Installation · Inspection · Repair · Drain field · Risers & lids
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River City Environmental
5410 NE 109th Ave, Portland, OR 97220
From their website: Pumping · Installation · Repair · Drain field · Aerobic systems · Risers & lids · Perc testing · Grease traps
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Septic Services in Portland
Public Service Building, 920 SW 6th Ave, Portland, OR 97204
From their website: Pumping · Installation · Repair
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Superior Underground
6400 SE 101st Ave Unit 3, Portland, OR 97266
From their website: Installation · Inspection · Repair
Gresham 9
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Daryl Webber
925 SE 205th Dr, Gresham, OR 97030
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #775 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Dcx, LLC
1654 NE Hacienda Ae, Gresham, OR 97030
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3661 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Igor Basarab
3412 NW 1st St, Gresham, OR 97030
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3711 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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JKR Construction LLC
PO Box 2263, Gresham, OR 97030
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #742 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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JKR Construction LLC
PO Box 2263, Gresham, OR 97030
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #743 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Pilot Environmental
2158 SE 14th Alley, Gresham, OR 97080
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #540 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Quality Septic & Excavation LLC
PO Box 3111, Gresham, OR 97030
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1018 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Reynolds Sewers
PO Box 1828, Gresham, OR 97030
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3552 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Williams Development LLC
30830 SE Bluff Rd, Gresham, OR 97080
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3937 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
Corbett 6
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AHO Custom Building & Remodel
PO Box 71, Corbett, OR 97019
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1132 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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BDL Plumbing and Excavation
PO Box 85, Corbett, OR 97019
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1058 (Oregon Department of Environmental Quality, verify)
From their website: Repair · Drain field Per state license: Installation
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Evergreen Remodeling Inc
PO Box 125, Corbett, OR 97019
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #681 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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KM2 Construction LLC
33900 E. Historic Columbia River Hwy, Corbett, OR 97019
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3921 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Plumb Solutions
527 NE 365th Ave, Corbett, OR 97019
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3917 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3927 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Priester Excavating Inc
44001 SE Hogue Mill Rd, Corbett, OR 97019
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #865 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
Troutdale 6
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Goodman Sanitation
568 SW Halsey Loop, Troutdale, OR 97060
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3507 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Goodman Septic Services
1009 NE Harlow Rd, Troutdale, OR 97060
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #53 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #891 (Oregon Department of Environmental Quality, verify)
From their website: Pumping · Installation · Inspection · Repair · Drain field · Risers & lids · Perc testing · Grease traps
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Iron Horse Excavation, LLC
31005 E Historic Columbia River Hwy, Troutdale, OR 97060
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #464 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Katahdin Excavation LLC
31132 SE Division Dr., Troutdale, OR 97060
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3881 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Monti Excavation LLC
PO Box 220, Troutdale, OR 97060
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #4097 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Ranger Excavation, LLC
2939 SE 287th, Troutdale, OR 97060
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3774 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
Fairview 4
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Dirt and Aggregate Interchange, Inc.
20905 NE Sandy Blvd., Fairview, OR 97024
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3685 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Environmental Works
22820 NE Sandy Blvd, Fairview, OR 97024
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3831 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3851 (Oregon Department of Environmental Quality, verify)
From their website: Pumping · Installation · Inspection · Repair · Drain field
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Interlaken, Inc.
PO Box 2010, Fairview, OR 97024
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3702 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Jackson Runge
21551 NE Laurel Wood Ln, Fairview, OR 97024
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3723 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
Hillsboro 1
No listings match those filters.
Septic licensing in Oregon
Oregon licenses sewage disposal businesses and certifies the installers who work for them. The Oregon DEQ, Sewage Disposal Service licensing issues these credentials: Sewage disposal service license (installer, pumper); DEQ installer certification.
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Multnomah County and whether the permit fee is in their quote.
Oregon septic licensing: agencies, license types and how to check a license →
Septic companies in Multnomah County: common questions
How many licensed septic companies are in Multnomah County, OR?
44 septic companies serve Multnomah County, Oregon, and 39 of them hold a Oregon septic license or certification matched to the Oregon Department of Environmental Quality list (data as of October 2026). Each license badge on this page names the agency and links to its lookup so you can confirm it.
Who licenses septic contractors in Oregon?
Oregon licenses sewage disposal businesses and certifies the installers who work for them. The licensing body is the Oregon DEQ, Sewage Disposal Service licensing.
Which companies pump septic tanks in Multnomah County?
6 of the 44 listings in Multnomah County offer septic tank pumping, either on their own website or under a state pumper license. Use the service filter above to show only those companies.
Which companies install septic systems in Multnomah County?
44 listings in Multnomah County install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their Oregon license.
How do I check a septic contractor's license in Oregon?
Use the Oregon DEQ, Sewage Disposal Service licensing's lookup (https://www.oregon.gov/deq/permits/Pages/YDO-Public-Records.aspx) and search the contractor's name or license number. Our guide to checking a septic license walks through it.