“Inflow and Infiltration” means the volume of both infiltration water and inflow water found in the sanitary sewer system.

“Infiltration” means the intrusion of groundwater into the sanitary sewerage system through defective pipes, pipe joints, connections or manholes in the sanitary sewerage system or building sewers.

“Inflow” means a direct flow of water other than wastewater that enters the sanitary sewerage system or building sewers from such sources as, but not limited to, roof leaders; cellar, yard, area, and foundation drains; uncontaminated or no-contact cooling water discharges; drains from springs and swampy areas; manhole covers; cross connections from storm drains; catch basins; stormwater; surface runoff; and street wash waters.