+Wastewater is water that has served its purpose, now a carrier of human and industrial impurities. This used water, flowing from homes and factories, demands [Water Treatment](/wiki/water_treatment) to purify it before rejoining the [Water Cycle](/wiki/water_cycle). Its responsible handling is crucial for both health and environmental balance.
+## See also
+- [Pollution](/wiki/pollution)
+- [Sanitation](/wiki/sanitation)
+- [Sewage](/wiki/sewage)