For more than four decades, RETTEW has been a trusted partner in wastewater engineering serving hundreds of communities, authorities, and utilities. From extending service to rural areas with no existing infrastructure to rehabilitating aging systems in established urban centers, the demands on wastewater systems are growing in scope and complexity. At RETTEW, we help our clients navigate those challenges with practical, cost-effective solutions grounded in deep technical expertise and a genuine commitment to long-term community resilience.

We develop comprehensive approaches to wastewater management from the earliest stages of planning through construction and beyond, covering feasibility studies, planning, facility design, and collection system design. Every project begins with your community's specific regulatory requirements and operational realities. From there, treatment solutions are scaled to fit — whether that means conventional activated sludge, fixed film and moving bed bioreactor systems, or advanced biological and enhanced nutrient removal. Our collection system design follows the same principle. RETTEW's expertise spans gravity sewers and interceptors, alternative methods such as pressure and vacuum systems, and pump station design, ensuring your entire system is managed with equal attention from source to treatment.

The same discipline we apply to technical design carries through the full project lifecycle. Our team manages project financing strategies and grant administration to help you identify and secure available funding, reducing the financial burden on ratepayers and municipal budgets. Once funding is secured, RETTEW's construction-phase services and resident project representation keep your project on schedule, on budget, and built to last. That continuity carries into treatment operations as well, where our experience with biosolids stabilization, handling, and disposal, along with disinfection and odor control systems, means one team addresses the full spectrum of treatment needs to one consistent standard of care. The result is a wastewater program your community can rely on for generations.