Wikipedia

Wastewater treatment part of the overarching field of sanitation. Sanitation also includes the management of human waste and solid waste as well as stormwater (drainage) management
Water supply and sanitation in Brazil urban slums (favela) and in rural areas without access to piped water or sanitation. Water is scarce in the northeast of Brazil. Water pollution is common
Integrated urban water management in Medellín Valley. The Medellín River and Flowing Streams Sanitation Program, led by EPM, aims at the decontamination of the Medellín River and a reduction of the rivers
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