Project No. 27503

Project Start Date: Fall 2026     

Estimated Completion Date: Fall 2034

Project Manager: Brian Bailey 703-737-7092

Project Description: The Town's discharge permit for the WPCF includes both concentration and waste load allocation limits for nitrogen. When the average flow to the WPCF exceeds 5 million gallons per day, the waste load allocation limit will govern the permit requirements related to nitrogen. To meet the waste load allocation requirements in the discharge permit, the WPCF will need to modify the existing facilities and (likely) construct new facilities. The initial phase of the project includes hydrocyclones to "densify" the return activated sludge; the future phase includes adding an anaerobic zone to the existing secondary process, which will further densify the sludge.

Project Updates: The hydrocyclones project is in construction and is expected to be completed in mid-2027.