The Village of Waterbury Wastewater Treatment Plant (WWTP) is located on the Winooski River floodplain, which poses challenges from significant flooding during the spring runoff and storm seasons to strong algal blooms in late spring. During algal blooms, the plant encounters bright green lagoon effluent high in total suspended solids (TSS), resulting in treatment upsets and inconsistent permit compliance. The system is part of a sensitive mountain watershed that discharges into Lake Champlain.
The Waterbury facility was designed in the 1980s for an average daily flow of 0.51 MGD and a peak hourly flow of 1.02 MGD. It uses three lagoons for biological treatment, followed by a chlorine contact chamber before discharges into the Winooski River.