Licensed Septic Companies in Columbia County, OR
26 septic companies serve Columbia County, Oregon, and 26 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 Columbia County
Guides: Septic tank pumping · Septic system installation · Septic inspection · Septic repair · Drain field repair · Installation cost · Pumping cost
26 septic companies in Columbia County
Clatskanie 7
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Bergman Construction LLC
PO Box 1264, Clatskanie, OR 97016
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3842 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Bradley McKay, General Contractor
PO Box 1349, Clatskanie, OR 97016
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3443 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Clatskanie Septic Service LLC
PO Box 1297, Clatskanie, OR 97016
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3983 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1093 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Don Hooper Inc
75960 Delena Rd, Clatskanie, OR 97016
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #263 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Earl Scott Septic
PO Box 1574, Clatskanie, OR 97016
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #328 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Hamilton Property Improvement LLC
18401 Johnson Rd, Clatskanie, OR 97016
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1261 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Schwartz General Contracting
79457 Blackford Rd, Clatskanie, OR 97016
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3750 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
Scappoose 6
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Bellwether Design LLC
PO Box 417, Scappoose, OR 97056
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3839 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Jason LaTour
34101 Quail Lane, Scappoose, OR 97056
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3934 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Jobin Construction LLC
32775 SW Huser Ln, Scappoose, OR 97056
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3824 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Kessi Construction Inc
34366 East Columbia Ave., Scappoose, OR 97056
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #429 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Lonny Brady Excavation
PO Box 851, Scappoose, OR 97056
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #359 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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WB Excavation LLC
PO Box 919, Scappoose, OR 97056
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1217 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
St. Helens 3
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K. Schwarz Construction
PO Box 1173, St. Helens, OR 97051
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1208 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Richard J Louie
58628 Louie Ct, St. Helens, OR 97051
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #105 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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TJD Solutions Inc.
293 Sunset Blvd., St. Helens, OR 97051
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1206 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
Warren 3
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Advantage Excavating LLC
33623 Bennett Rd., Warren, OR 97053
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3493 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Makana Trucking & Excavation
34154 Bennett Rd, Warren, OR 97053
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1030 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Makana Trucking and Excavation, Inc.
34154 Bennett Rd, Warren, OR 97053
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #996 (Oregon Department of Environmental Quality, verify)
From their website: Pumping · Installation · Inspection · Repair · Drain field
Rainier 2
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4Telney Construction and Trucking
26228 Pellham Hill Rd, Rainier, OR 97048
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3800 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3799 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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LeviLynn Contracting and Underground LLC
814 W. D St., Rainier, OR 97048
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #4050 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
St Helens 2
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M. E. Moore Construction, Inc
PO Box 838, St Helens, OR 97051
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #300 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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McMullen Water Systems
145 N 19th St, St Helens, OR 97051
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #574 (Oregon Department of Environmental Quality, verify)
From their website: Perc testing Per state license: Installation
Vernonia 2
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Halladay & Son
PO Box 53, Vernonia, OR 97064
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1248 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Robert J Watts Construction, Inc
PO Box 65, Vernonia, OR 97064
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #707 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
Deer Island 1
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Hobby Logging and Construction, Inc
64796 Meissner Rd, Deer Island, OR 97054
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #305 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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 Columbia 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 Columbia County: common questions
How many licensed septic companies are in Columbia County, OR?
26 septic companies serve Columbia County, Oregon, and 26 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 Columbia County?
1 of the 26 listings in Columbia 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 Columbia County?
26 listings in Columbia 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.