Licensed Septic Companies in Clatsop County, OR
24 septic companies serve Clatsop County, Oregon, and 24 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 Clatsop County
Guides: Septic tank pumping · Septic system installation · Septic inspection · Septic repair · Drain field repair · Installation cost · Pumping cost
24 septic companies in Clatsop County
Astoria 15
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AC/DC Excavating LLC
87180 Hwy 202, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #954 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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AC/DC Excavating LLC
87180 Hwy 202, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #926 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Blind Slough Logging, Inc.
41092 Ziak-Gnat Creek Ln, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #197 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Bud's Excavation LLC
42142 Tiffany Ln, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1159 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Dennis Larson Excavating
90128 Lewis and Clark Rd, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #4023 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Ed's Septic Tank Cleaning Service LLC
808 Glasgow Ave, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #877 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Green Mountain Development LLC
36089 Binder Slough Ln, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1077 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Jump Excavating
35655 Dow Ln, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #4038 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Kinney & Sons Dump Trucking LLC
91569 George Hill Rd, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #764 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Old World Renovation
428 Floral St., Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3466 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Robert Martens Excavating
37166 Danner Ridge Lane, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3643 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Robert Martens Excavation, LTD
92859 Renee Rd, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #338 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Thoreson Excavating LLC
91594 Youngs River Rd, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1091 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Tyler Flavin
92277 Koppisch Rd, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3638 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Vanosdol Construction LLC
35134 Hellisgo Ln, Astoria, OR 97103
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3582 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
Warrenton 4
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Jason Kraushaar Contracting LLC
89652 Westlake Acres Dr, Warrenton, OR 97146
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1037 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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North Pacific Excavation
PO Box 1173, Warrenton, OR 97146
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #484 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Osburn Olson Excavation And Land Development
2207 SE Dolphin, Warrenton, OR 97146
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #826 (Oregon Department of Environmental Quality, verify)
From their website: Installation · Drain field · Risers & lids · Perc testing
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Owen Miller
33322 Dorymen Ln, Warrenton, OR 97146
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3647 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
Seaside 3
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J. Jackson LLC
PO Box 1072, Seaside, OR 97138
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3945 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Jewell Industries LLC
79602 Highway 202, Seaside, OR 97138
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #4067 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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L. Williams Excavation LLC
614 12th Ave., Seaside, OR 97138
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #4051 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
Gearhart 2
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Bob McEwan Construction Inc
PO Box 2845, Gearhart, OR 97138
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1050 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #83 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1051 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Evans
3767 Hwy 101 N., Gearhart, OR 97138
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3706 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3694 (Oregon Department of Environmental Quality, verify)
From their website: Pumping · Inspection · Repair · Drain field 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 Clatsop 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 Clatsop County: common questions
How many licensed septic companies are in Clatsop County, OR?
24 septic companies serve Clatsop County, Oregon, and 24 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 Clatsop County?
1 of the 24 listings in Clatsop 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 Clatsop County?
24 listings in Clatsop 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.