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St Helens, Oregon

Licensed Septic Companies in St Helens, OR

5 septic companies serve St Helens, Oregon, and 5 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 St Helens

Guides: Septic system installation · Installation cost · Pumping cost

5 septic companies in St Helens

  • K. Schwarz Construction

    PO Box 1173, St. Helens, OR 97051 · Columbia County

    • Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1208 (Oregon Department of Environmental Quality, verify)

    Per state license: Installation

    (503) 730-9728 sthelensoregon.gov

  • M. E. Moore Construction, Inc

    PO Box 838, St Helens, OR 97051 · Columbia County

    • Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #300 (Oregon Department of Environmental Quality, verify)

    Per state license: Installation

    (503) 397-2737

  • McMullen Water Systems

    145 N 19th St, St Helens, OR 97051 · Columbia County

    • Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #574 (Oregon Department of Environmental Quality, verify)

    From their website: Perc testing Per state license: Installation

    (503) 397-1744 mcmullenwater.com

  • Richard J Louie

    58628 Louie Ct, St. Helens, OR 97051 · Columbia County

    • Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #105 (Oregon Department of Environmental Quality, verify)

    Per state license: Installation

    (503) 397-0728

  • TJD Solutions Inc.

    293 Sunset Blvd., St. Helens, OR 97051 · Columbia County

    • Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1206 (Oregon Department of Environmental Quality, verify)

    Per state license: Installation

    (503) 438-8772

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 St Helens and whether the permit fee is in their quote.

Oregon septic licensing: agencies, license types and how to check a license →

Septic companies in St Helens: common questions

How many licensed septic companies are in St Helens, OR?

5 septic companies serve St Helens, Oregon, and 5 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 install septic systems in St Helens?

5 listings in St Helens 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.