Carollo Engineers is an environmental engineering firm specializing in the planning, design, and construction of water and wastewater facilities. Carollo’s reputation is based upon client service and a continual commitment to quality. We currently maintain 33 offices nationwide.
During our 80-year history, Carollo has successfully completed more than 15,000 projects for public sector clients. Carollo is currently ranked within Engineering News Record’s (ENR) top 100 design firms. More importantly, ENR’s annual Source Book ranks Carollo among the top firms for water and wastewater treatment plant design. Unlike our competitors, Carollo only provides water and wastewater engineering services.