The wastewater treatment system (also known as the sanitary sewer system) transports dirty wastewater from houses and buildings, to the wastewater treatment plant. The wastewater is treated and cleaned before it is discharged into the Cape Fear River. Think of this as the "brush and flush" system.
The drinking water system carries clean, potable, drinking water to houses and buildings.
The storm drainage system transports stormwater runoff from streets and property directly into waterways. The storm drainage system includes streets, storm drains, drainage ditches, pipes, culverts, retention ponds, wetlands, creeks, etc. Remember, stormwater runoff is not treated!