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 management in the Metropolitan Region of São Paulo was in charge of water supply and sanitation; municipalities were in charge of zoning, building permit and solid waste management; and CETESB was in charge
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
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