The extra flows at the treatment plant in winter are due to "Inflow and Infiltration," or I&I.
occurs when rainwater is improperly directed into the wastewater system instead of to storm drains.
occurs when groundwater seeps into the wastewater system through cracks or leaks in wastewater pipes.
The pump stations throughout Eugene and Springfield conveyed all of the wastewater to the treatment plant with no issues.
The wastewater treatment plant and staff performed exceedingly well during the rain event, and all discharge permit parameters were met.