Arlington Re-Gen Project Launches For Water Plant Modernization

ARLINGTON, VA — Arlington County has launched Arlington Re-Gen, a significant modernization project for its Water Pollution Control Plant located on South Glebe Road. This initiative marks the beginning of a multi-year effort to enhance the facility, aiming for improved cleanliness, environmental sustainability, and future readiness.

The initial phase, termed the “Early Work Package,” will concentrate on various preparatory activities. These include grading, the demolition of existing buildings, the relocation of utilities, and foundation work necessary for upcoming treatment systems. All these operations will occur within the fenced boundaries of the plant, ensuring that wastewater treatment services continue without interruption.

Following the early work, the County plans to commence construction for the “Main Work Package.” This phase is anticipated to start in late 2026 and extend through the spring of 2031. During this period, crews will construct new solids-handling facilities, which are central to the Re-Gen program. These facilities will incorporate thermal hydrolysis and anaerobic digestion systems designed to produce renewable resources.

The modernization will also feature modern dewatering and screening equipment, improved truck loading capabilities, and advanced odor control systems. The Arlington project has been under development for several years and is separate from the recent DC Water sewage spill in the Potomac River, according to the county.

The wastewater treatment process in Arlington generates biosolids, a nutrient-rich material that can be treated and repurposed. Upon completion, the Re-Gen project will enable Arlington County to convert this material into Class A biosolids and renewable natural gas. This conversion is expected to reduce the plant’s overall carbon footprint. Commissioning and phased startup of the new facilities are scheduled for 2031.