Affordable Wastewater Solutions for Municipal, Community, Commercial, and Residential Applications

Whether you need decentralized wastewater collection, treatment systems, or both, Orenco has your answer.

Care about clean water? So do we. That’s why in 1981, our founders designed great solutions for onsite wastewater systems and drove around the Pacific Northwest, showing system designers and engineers a better way to do things. And our innovative products and technologies have led the industry ever since.

Choose from the links below to learn more:

Orenco Awards And Recognitions   How The AdvanTex Treatment System Works   Orenco Effluent Sewers
Orenco Awards And Recognitions   How The AdvanTex Treatment System Works   Orenco Effluent Sewers


The Modern Sewer Solution
Prelos is the answer for community sewer, offering low life-cycle and initial capital costs and enabling more cost-effective wastewater treatment. This technology is based on nearly four decades of proven sewer solutions.

  • Pressurized liquid-only (effluent) sewer technology
  • Eliminates the need for scouring velocities
  • Small-diameter, liquid-only sewer lines follow grade and carry primary-treated effluent to the treatment facility.
  • Minimal community disruption during installation
  • 24- to 48-hr. reserve storage in each on-lot tank
  • Documented low life-cycle costs
  • Deferred capital costs on slow build-out developments
  • Allows for smaller, lower-cost, highly efficient treatment plants

AdvanTex® AX-Greywater is the solution.

Wastewater Treatment & Reuse

Water reuse is no longer a choice. It’s a necessity. As supplies of fresh water become increasingly scarce, methods of recycling and reusing this vital resource are getting more attention than ever before. Orenco’s AdvanTex® Treatment Systems consistently produce clear effluent that meets the most stringent permit limits. This effluent is suitable for a variety of reuse applications (governed by local regulations) including irrigation, toilet flushing, industrial cooling, and car washing. With a 15-year track record, the AdvanTex textile filters are a proven technology that not only treats greywater to reuse levels, but is also ideal for treating residential or commercial wastewater.

Wastewater treatment systems designed for reuse applications need to meet permit limits specific to their particular city, county, or state. Orenco’s AdvanTex® Treatment Systems use a multi-pass, packed-bed filter technology that’s ideal for handling highly variable flows and is also inherently more stable than suspended-growth, activated-sludge systems. A more stable process means greater reliability, lower operation and maintenance requirements, and greater confidence in meeting permit limits.

Countless waterfront homes treat their wastewater with AdvanTex® Systems.

The performance of AdvanTex® Treatment Systems has been tested in more than a dozen testing programs with outstanding results. Most were rigorous fi eld trials, such as Maryland’s “Best Available Technology” … where AdvanTex® came out ahead.

Cost-Effective, Environmentally Sound

Orenco Sewer™ (effluent-only sewer) is a cost-effective, environmentally sound wastewater collection system. With an Orenco Sewer, raw sewage flows from a house or business to a watertight underground tank. Only the filtered liquid portion is discharged (by either pump or gravity) to shallow, small-diameter collection lines that follow the contour of the land. Solids remain in the underground tank for passive, natural treatment and only need to be pumped every 10 to 12 years (depending on the number of residents and the tank volume).

Orenco Sewers take significantly less time to install than conventional sewers. And in an Orenco Sewer, material and excavation costs are reduced because the inexpensive collection lines are shallowly buried just below the frost line. Because only liquid is being pumped, system designers don’t need to worry about minimum velocities and associated grades. This simpler installation process causes less disruption to communities and allows businesses to operate normally during construction.

Proven, Dependable, Scalable

Orenco’s AdvanTex® AX-Max™ Treatment Systems are a dependable, proven technology for treating domestic-strength, primary-treated effluent to better-than-secondary standards, including nitrogen-reduction. They consist of sturdy, watertight fiberglass tanks that incorporate recirculation-blend and discharge tankage in a single module. Each unit also includes pumping systems, ventilation, and a lightweight, highly absorbent, engineered textile media that treats a tremendous amount of wastewater in a small space.


AX-Max Treatment Systems are intended for large residential applications or for commercial and municipal applications that require advanced secondary treatment. They eliminate the need for separate recirculation and discharge tanks by performing both functions within a single module. AX-Max units are ideal for subdivisions, “fringe” development, hotels, resorts, schools, churches, businesses, manufactured home parks, RV parks, campgrounds, rest areas, and truck stops.


Depending on model, a single AdvanTex AX-Max unit can treat flows of 5000-15,000 gpd (18.9-56.8 m3/day). AdvanTex Treatment Systems are modular, however, and can be installed in multi-unit arrays to handle higher flows.

Standard, Custom, & OEM

Orenco Controls engineers control panels with extremely high standards of quality and reliability, designed specifically to minimize production costs and time. Here are some of the benefits we offer:

  • Standard, custom, and OEM panel designs
  • Quality components from names you trust. We can also integrate your preferred components or proprietary controllers into the panels we produce for you.
  • A fully equipped UL508A/ UL698A shop
  • Outstanding pricing. Due to the high volume of panels we produce, we’re able to negotiate the best component prices with our suppliers.
  • Quick submittal and delivery times

Customizable, Turn-Key Solutions

Orenco Composites™ manufactures buildings and shelters for many different industries, including water and wastewater, telecommunications, power utilities, and transportation. Our prefabricated buildings and shelters can be manufactured and delivered quickly as a complete, turn-key solution for your job site. That means your project can be operational in just hours after setting the prefab building in place — hours, not weeks!

DuraFiber™  FRP buildings are corrosion-resistant, UV-resistant, and impact-resistant. Orenco Composites buildings and shelters will never rot because no wood is used in the construction of our buildings or doors. All of our buildings are closed-molded with high-strength fiberglass fabrics, not the manually chopped glass that most fiberglass building manufacturers use. In addition, DuraFiber buildings and shelters are molded as a single-piece, resulting in a seamless, leak-proof structure. Our standard, 3-inch (76 mm) foam-core fiberglass walls and roof provide unsurpassed structural integrity, while keeping the interior warm with R-18 insulation. The exterior surface is protected with a high-performance polyaspartic urethane paint, far superior to standard gelcoats. DuraFiber buildings and shelters are also extremely rugged — they can withstand 160+ mph winds and support a 100-lb/ft2 live load. If you want a building built to last — and one that will stand up to extreme weather conditions — choose a high-quality DuraFiber building or shelter.

T-Max Rectangular Tanks

Orenco Composites’ rectangular fiberglass-reinforced polymer (FRP) T-Max™ tanks are versatile storage vessels, useful for a variety of industries and applications. T-Max tanks are molded as a single piece using vacuum infusion, providing a high-strength, seamless vessel. The unique foam-core structural wall design provides integral insulation (R24 or more) and strong, stiff walls — strong enough that T-Max tanks can be buried or sit above ground.

T-Max tanks can be configured with multiple baffles, access covers and hatches, safety railings, and ladders. In addition, tanks can be fully outfitted with slide rail systems, pumping systems, filters, and many other custom internal components. T-Max tanks come fitted with four steel lifting lugs for ease in moving and placing tanks.

T-Max tanks are often the most cost-effective, long-term solution for many storage requirements, outperforming other materials such as steel and concrete. Orenco Composites manufactures FRP tanks of varying sizes to meet your project needs, with capacities from 300 gallons to 40,000 gallons. We can also produce rectangular tanks that can be built in place using panel construction. These are typically used on difficult sites — indoor or outdoor — where access and space are limited.

T-Max rectangular fiberglass tanks can be used in a variety of applications, including water and wastewater treatment processes, potable and non-potable water storage, sewage storage, sludge storage, chemical storage, and much more.


Since 1981, Orenco Systems, Inc. has researched, designed, and manufactured innovative onsite and decentralized wastewater collection and treatment technologies. Our solutions include community collection systems, advanced secondary treatment systems, watertight fiberglass tanks, and in-tank pumping and filtration systems. We also manufacture high-quality standard, custom, and OEM controls, along with state-of-the-art fiberglass buildings, tanks, and enclosures. Learn more at or call +1 (541) 459-4449.


Orenco Systems, Inc.

814 Airway Avenue

Sutherlin, OR 97479


Phone: 800-348-9843

Contact: Tammy Talton


  • Orenco Systems, Inc., is celebrating four decades of protecting the world’s water. As part of reaching this milestone, the company is making some significant changes that better reflect its plans for the future.

  • The level of acceptance and implementation of wastewater reuse and recycling strategies varies dramatically across geographic regions. Several drivers impact the perceived necessity for regulatory structures that allow – or sometimes encourage – the treatment of sewage to levels for reuse.

  • The need for of nitrogen-reducing wastewater treatment systems has become more common in the past few decades due to various environmental concerns, including eutrophication, oxygen depletion, and toxicity to aquatic organisms in lakes and streams. The addition of nitrogen removal to any wastewater treatment plant, new or existing, typically increases the costs of the project significantly. When evaluating suitable technologies, it becomes critical to properly identify processes that can not only proved the best upfront capital value but also provide the most sustainable long-term functionality.

  • Pressure sewers (effluent or grinder) and gravity sewers require different methods of construction, different installation techniques, and different degrees of accessibility to install the various products and system components. The construction impact of installing any sewer system technology falls under two main categories: on-lot and right-of-way (ROW). 

  • As the cost of and demand for potable water increases, engineers, planners, and utilities need reliable, innovative methods for protecting this valuable resource. Cost-effective and environmentally sustainable wastewater collection and treatment systems are vital components in the water cycle and therefore require careful analysis. While there is no single solution for every site or community, traditional ‘big-pipe’ systems are rarely appropriate in sensitive environments; fortunately, today there are more options than ever to consider.

  • Vero Beach (population 15,220 in 2010) is a small but densely populated city adjacent to the Indian River Lagoon on Florida’s east coast. Many of the city’s approximately 1,500 on-site septic tanks and drainfields were failing, and the excess nitrogen, phosphorus, and bacteria were considered primary contributors of pollution to the watershed.

  • Alternative wastewater collection systems, such as pressure sewers, provide affordable service to municipalities, new subdivisions, and areas where gravity sewers are difficult and expensive to install.

  • More long-term data is available than ever before to help wastewater designers and engineers make accurate estimates of up-front costs and life-cycle costs associated with pressure sewer systems. In addition, incorporating extended equipment warranties into project evaluations, specifications, and contract documents is a pivotal tool to help decision makers reveal the true, long-term equipment costs of various sewer system technologies.

  • Just thirty minutes northwest of downtown Calgary, Silverhorn is an exclusive community that provides a country setting with a luxury lifestyle. It boasts large lots and offers clients a choice of five master homebuilders to design their custom home. Amenities include over four miles of walking trails and high-speed fiber optic internet availability.

  • In June, 2016, a new Love’s Travel Stop opened in Boardman, Oregon, offering professional truck drivers and other travelers 24-hour access to clean, safe places to buy gas, diesel fuel, travel items, meals, and snacks. An essential part of this particular Travel Stop is the private well that provides water for all of the 11,000-square-ft facility’s needs, including food preparation, showers, bathrooms, outside irrigation, and fire hydrants.

  • Straight pipes, failed drainfields, polluted lakes, out-of-compliance discharge permits, and several other indicators of wastewater management issues are widespread throughout Iowa’s rural communities. By Tyler Molatore, Orenco Systems®, Inc.

  • The city of Vero Beach is located adjacent to the Indian River Lagoon (or the “IRL”) along the Atlantic Coast of Florida. By Lindsay Tucker, P.E., Orenco Systems and Rob Bolton, P.E., City of Vero Beach

  • Alternative wastewater collection systems, such as pressure sewers, can save small communities millions of dollars in capital costs when compared with conventional gravity sewers. By Tyler J. Molatore, P.E., Orenco Systems®, Inc.


  • As supplies of fresh water become increasingly scarce, methods of recycling and reusing this vital resource are getting more attention than ever before. Orenco’s AdvanTex® Treatment Systems consistently produce clear effluent that meets the most stringent permit limits. This effluent is suitable for a variety of reuse applications (governed by local regulations) including irrigation, toilet flushing, industrial cooling, and car washing. With a 15-year track record, the AdvanTex textile filter is a proven technology that not only treats greywater to reuse levels, but is also ideal for treating residential or commercial wastewater.

  • The Boy Scouts of America (BSA) wanted an environmentally friendly method for disposing of the greywater generated by the 336 shower buildings at their showcase camping and training facility, the Summit Bechtel Family National Scout Reserve (SBR) in West Virginia. The chosen technology would need to be energy-effi cient and take up as little space as possible.

  • Liquid-only sewers (also known as “effluent sewers”) have proven to be a cost-effective solution for municipalities, new subdivisions, and a variety of other areas in need of sewer. As opposed to the big pipes and deep excavations typically required by gravity sewers, liquid-only sewers use small-diameter, shallowly buried mainlines that follow the contour of the land and are easily installed with light-duty equipment, minimizing disturbance to the surrounding area.

  • In 2017, the Golden Gate National Recreation Area in California was the second most visited place in the entire U.S. national park system, with almost fifteen million visitors. Established in 1972, it’s also one of the largest national parks located in an urban area, offering a wide variety of activities – from touring Alcatraz Island to hiking Montara Mountain to swimming at Stinson Beach.

  • The community of Kinglake West was on a waiting list to receive government financing for a new sewer system when, in 2009, a disastrous fire swept through the area. The damage was so extensive that funding for a wastewater collection system was expedited. The new system needed to be up and running as soon as possible, without being an undue financial burden to homeowners.

  • Along the Indian River Lagoon adjacent to Vero Beach, Florida, both residents and government officials were becoming increasingly concerned about excessive nutrient loads and pollution.


  • Nick Herrera installs Orenco's AdvanTex Wastewater Treatment Systems in Northern California. Watch Nick's interview to learn more.

  • Orenco Effluent Sewers are an affordable, environmentally sound, and easy-to-maintain alternative to conventional gravity sewers. Ideal for municipal sewer expansions, new development, septic tank abatement projects, and commercial or residential clusters. Watch the full video to learn more.

  • This video explains the differences between standard residential septic systems and advanced treatment systems. It describes how Orenco's AdvanTex textile treatment systems work and how well they treat household wastewater. It also recommends questions that property owners should ask when researching their wastewater treatment options, including performance, noise, smell, and maintenance costs.

  • This video highlights awards and recognitions for system installations by Orenco Systems.


  • Fiberglass-reinforced polymer (FRP) is a superior material for many industrial products. Orenco Composites™ manufactures customizable fiberglass products that are lightweight, durable, and corrosion-resistant with a high strength-to-weight ratio. These products don’t rot, rust, dent, or conduct electricity, making them ideal for a wide range of environmental conditions. 

  • Control panels are useful for a wide range of water and wastewater applications. This one-hour webinar will cover the various control panels options available, their features, and suggested applications. 

  • This two-hour webinar presents long-term data that shows how Orenco Sewer™ collection systems can effectively and affordably serve municipalities of all sizes. We'll compare capital cost information compiled from over 50 publicly funded bids for Orenco Sewer, grinder sewer, and gravity sewer, as well as look at operational costs for these technologies. We'll also provide a demonstration of the WERF (Water Environment & Reuse Foundation) wastewater-planning tool. 

  • AdvanTex® Treatment Systems are the ideal onsite solution for residential wastewater treatment needs because they work well in a variety of locations and situations. In this webinar, we'll review the application, design, and benefits of AdvanTex for residential properties.  

  • Across the United States, nutrient discharges from wastewater systems are being restricted at an increasing rate. Decentralized wastewater treatment systems can provide better, more reliable solutions for reducing nutrients through biological processes. In this one-hour webinar, we'll discuss the use of Orenco treatment technologies for reducing nitrogen and other nutrients of concern. 

  • This two-hour webinar takes you through our Commercial AdvanTex® Design Criteria, an expansive document that provides detailed information on a wide range of commercial, industrial, and municipal wastewater applications for the entire AdvanTex product line.  

  • Conventional treatment systems are less of an option these days as more and more small communities need cost-effective, compact wastewater treatment solutions. This one-hour presentation begins with a brief history of packed-bed filters for commercial and community applications. It then focuses on the design and specification of AX-Max and AX-Mobile systems, followed by an overview of their installation and maintenance procedures. 

  • This two-hour webinar explains the ins and outs of designing an effluent sewer system. Topics include how to design hydraulic grade lines, designing and selecting pump systems, transport-line sizing, and other key details for successful effluent sewer design.

  • Greywater represents a large percentage of combined wastewater flows. As the demands on our supply of freshwater increase, greywater reuse becomes an attractive option for conserving potable water, especially in areas like California that are prone to drought. In this one-hour webinar, we’ll explain how greywater can be treated to levels that allow it to be used for toilet flushing, cooling towers, water features, and landscape irrigation (subject to local restrictions).