Wastewater is water that has been used by humans and is contaminated by that use. We commonly think of wastewater as water that goes through sinks, showers, toilets, dishwashers, or laundry machines. All of this water is contaminated with things like human waste, food, oils, soaps, and other pollutants.
Before wastewater can be released back into the environment or reused it must be treated to improve the water quality. This is important as the release of untreated water can have highly detrimental impacts on the environment and our sources of drinking water.
If you are interested in knowing more about how Sewanee treats its wastewater, click here.
Source for the above information is the US Geological Survey. More information can be found here.