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Many ideas come frequent being argued on as we can fight with this exaggerated water wastefulness. Ones of the found alternatives, was the responsible consumption and forms of exploitation of this I eliminate precious for the world. An alternative that comes very being used nowadays, is the pluvial water captation, in cities as So Paulo and Curitiba, had been created laws for the pluvial water captation. In So Paulo the state law N. 2526 of 2 of January of 2007 says in its article 1: ‘ ‘ The implantation of system for the captation and retention of pluvial waters, collected for roofs is obligator, coverings, terraces and floors discovered, in lots, built or not, that has waterproofed area superior 500m (five hundred square meters). The Served Waters will be directed, through proper plumbing, the destined reservoir to supply the discharges of sanitary vases e, only after such use, will be unloaded in the public net of esgotos.’ ‘ So that a system of pluvial water captation is implanted, is needed that the residence or company around, is installed gutters in the roof so that the water either caught, after the installations of these gutters, a plumbing has that to be made for it directs the collected water ties a reservoir, but before it is stored, it anger to pass for a filter, where first bigger leves and some dirts will be taken off, after the water to be filtered it is stored in the reservoir and which this water will be to be used for some end, a bomb will be responsible for the water sending for a hose until it arrives its final destination as she shows figure 1.