waste material,
waste matter,
waste product,
waste useless or profitless activity; using or expending or consuming thoughtlessly or carelessly; "if the effort brings no compensating gain it is a waste"; "mindless dissipation of natural resources"
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Wiktionary
Substantiv
wastewater -
Any water that has been used by some human domestic or industrial activity and, because of that, now contains waste products.
Wikipedia
Wastewater is any water that has been adversely affected in quality by anthropogenic influence. It comprises liquid waste discharged by domestic residences, commercial properties, industry, and/or agriculture and can encompass a wide range of potential contaminants and concentrations. In the most common usage, it refers to the municipal wastewater that contains a broad spectrum of contaminants resulting from the mixing of wastewaters from different sources.
OmegaWiki Dictionary
Ω
wastewater Water that has been used and contains dissolved or suspended waste materials.
