Yes. Waste water is defined as water that has been significantly altered by human influence, like the water the flows out of your toilets and sinks or the water that is used to clean up chemical processes in factories. Drainage water is simply the water that flows, usually because of rain, along the road and into a city’s drainage system. At times these waters combine in a city’s sewage system. This is called combined sewage overflow. This creates problems when there is a storm or flood and the city’s sewage overflows into the streets, thereby bringing the more dangerous wastewater back to the surface.
Typically, wastewater refers to any water that has been negatively affected by human impacts, while drainage water refers to runoff of properties. Wastewater is usually used to discuss grey water (from washing, sinks, etc.) and black water (sewage), although it can be more broadly used to describe drainage water as well.
Drainage water is any water collected by storm drains or a dewatering system. Most cities don’t treat drainage water due to heavy amounts of debris in it (tree limbs, trash, dead animals). Wastewater is any type of water that has some type of negative effect on the water quality. Often it includes water discharged from homes, office and retail buildings, agricultural buildings, industrial buildings, manufacturing plants or contaminated ground water. Wastewater is generally what goes down the drain, and is often sanitized to be reused.
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