+**Sewage** is liquid [Waste Water](/wiki/waste_water) typically discharged from residential, commercial, and industrial areas, containing human waste, household chemicals, and other pollutants. Untreated, it poses significant risks to [Public Health](/wiki/public_health) and ecosystems, necessitating controlled collection and processing.
+## See also
+- [Sanitation](/wiki/sanitation)
+- [Water Treatment](/wiki/water_treatment)
+- [Water Pollution](/wiki/water_pollution)
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