Since 1981, we've been protecting the world's water by helping communities find the best, most sustainable wastewater solutions. Our Prelos™ Sewer Collection System is the culmination of four decades of experience and research on what really works over the long term. Whether you need collection, treatment, or both, Orenco has your answer. 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.