Company Overview

Since 1981, Orenco Systems — headquartered in Oregon, USA — has designed and sold affordable, sustainable wastewater treatment products for properties not served by conventional sewers. Our award-winning technologies are cited in wastewater texts and installed all over the world. They include fiberglass septic tanks and septic systems, advanced treatment systems, effluent sewers, and electrical control panels.

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What's New

Effluent Sewer Systems: Real-World Data Available

Those who work with effluent sewers know - and have demonstrated repeatedly - that they're the most cost-effective solution when looking at whole-life costs. Orenco's Terry Bounds, P.E., and Grant Denn recently wrote a paper that helps designers and engineers develop accurate cost information about effluent sewers based on facts, not conjecture. Download "Decentralized Design Considerations and Life-Cycle Costs" to learn more.

Orenco Systems Chosen for "Top Projects" Award

An Orenco project in Christiansburg, Ohio, was named a 2015 “Top Project” by Water & Wastes Digest. Winners were chosen based on the challenges presented by their projects and how they met those challenges. Sam Carter, Orenco’s Sales and Marketing Director, accepted the award at WEFTEC 2015 in Chicago. To learn more about this award-winning project, see our Christiansburg Case Study.

Fiberglass Industrial and Utility Products Website

Orenco’s fiberglass products division, Orenco Composites, has launched a new website to introduce its industrial-scale processes and products. Visit to learn more about these industrial products – including large tanks, basins, shelters, and custom parts – and about how they’re made.

Check Us Out!

Check out this short video about Orenco's affordable Effluent-Only Sewers:




  Residential Solutions
Wastewater treatment for builders and homeowners
Engineered Solutions
Wastewater treatment for communities and commercial properties
Controls & Monitoring
Control Panels for multiple markets

Headquartered in Sutherlin, Oregon, Orenco employs about 300 people and sells its products through 300 points of distribution in North America, Central America, South America, Australasia, Europe, Africa, and Southwest Asia. The company’s systems have been installed all over the world.

Click on the map below to visit our international site.





“I’ve always liked the proactive approach that Orenco takes. I have two criteria regarding any product specifications: the product does the job and the company provides technical support. Orenco excels in both, which makes me look good and my clients happy.”

— David Monihan, Jr., P.E., RLS