Advanced Wastewater Solutions
For more than 90 years, Carollo Engineers has supported the planning, design, construction, and startup of wastewater treatment plants across the country, regardless of size, type, or purpose. We commit our unparalleled experience and knowledge to meet each organization and community’s unique wastewater needs now and into the future. We offer comprehensive process expertise in both conventional and emerging technologies with an unwavering focus on excellence in facilities planning and design.
- Wastewater systems planning
- Facilities optimization, upgrades, and expansion
- Nutrient reduction
- Process intensification
- Emerging and innovative technology application and development
- Solids handling and reuse

Solutions that are built to last
Now more than ever, wastewater challenges demand creative problem-solving that pushes boundaries.Our goal is to enhance wastewater systems into assets that will resiliently serve our communities for years to come. We accomplish this by striking a balance between proven best practices and the latest advancements in treatment technologies. So we may continuously evolve with the most up-to-date knowledge, our expert teams across the country also monitor industry trends related to nutrient reduction, intensification, energy management, and sustainability.
These efforts culminate in Carollo’s robust, easy to operate, logically laid out, and innovative (RELI) designs. Facilities designed through the RELI approach have the following advantages:
- Experience a longer useful life.
- Are constructed at reasonable capital costs.
- Benefit from reduced long-term operations and maintenance costs.
- Operate flexibly to accommodate changing conditions.
When faced with aging water infrastructure, tighter discharge criteria, budget constraints, and critical community interests that test conventional approaches, Carollo is your partner for progress.
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