Define wet well.

• A. The tank where wastewater is collected; water is pumped from the wet well and found in lift stations and at the headworks of the plant
• B. A tank used to store treated effluent before discharge
• C. A device used to disinfect wastewater
• D. A settling basin used for sludge

Answer: (A)

A wet well is the collection tank at a lift station where wastewater gathers before being pumped to higher points in the system. It provides a reservoir for the pumps to draw from, allowing flow to be regulated as levels rise and fall. From the wet well, wastewater is pumped onward to lift stations and then to the plant’s headworks for initial treatment. This makes it the best description because it focuses on the role of gathering incoming wastewater and feeding the pumps that move it to the next stage. The other descriptions refer to downstream components or different devices: a tank for treated effluent, a disinfection device, or a settling basin for sludge, none of which match the function of a wet well.