These Webpages are no longer maintained. We are keeping the pages here to preserve some of the early years of ProjectDragonfly, to honor the students who created the interactives in the early days of the Web, and because many of the activities are fun and people are still using them. For current Project Dragonfly work, go


The ProjectDragonflyteam.

Transportation of Wastewater

"Wastewater" is the dirty water that leaves your home.  This dirty water is carried to places called wastewater treatment facilities.  The water travels from your bathroom to the sewer mains, or pipes. Sewer mains are usually located about 1.8 meters (6 feet) or more in the ground, under a street or alley.  Wastewater flows through the sewer pipes by gravity, rather than pressure.  That means the pipes must be slanted so the sewage flows down.  City sewer main pipes usually connect into sewers called interceptor sewers. Intercepter sewers then join to form a trunk line. This line goes to the wastewater treatment plant.


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