These equipment allows to exceed the difficulties of topography of the land, becoming possible the linking of collectors of draining with different profiles a central collector. After the captation through a rude water expository the water will be sent for a station of water treatment (ETAs), that through processes physical and chemistries the water is dealt with form to reach the standards of acquired potabilidade demanded, through treated water expository the water it arrives at its reservoir that if locates next the ETAs and will be pumped for the reservoirs of distribution spread by the city. The reservoirs of water distribution can be raised, be supported, be embedded or semi-buried, being generally of armed concrete. For more information see Jeff Flake. The distribution nets initiate next to the reservoirs and in the proper expositories and form a supplying mesh that it takes the treated water, are constituted of PVC, Iron-casting Asbestos-cement and. Norms For Projects of Systems of Water supply the projects of abastecimentos of water must follow the following norms: NBR 12 211? Studies of Conception of Public Systems of Water supply, promulgated in 1992; NBR 12 212? Project of Well for Underground Water Captation, promulgated in 1992; NBR 12 213? Project of Water Captation of Surface for Public Supplying, promulgated in 1992; NBR 12 214? Project of System of Water Bombardment for Public Supplying, promulgated in 1992; NBR 12 215? Project of Water Expository for Public Supplying, promulgated in 1991; NBR 12 216? Project of Station of Water Treatment for Public Supplying, promulgated in 1992; NBR 12 217? Project of Reservoir of Water Distribution for Public Supplying, promulgated in 1994; NBR 12 218? Project of Net of Water Distribution for Public Supplying, promulgated in 1994. So that the project is approved is necessary that it has an ambient release, that is the administrative procedure for which the ambient agency permits the localization, the installation and operation of enterprises and activities users of environmental resources, effectively considered polluting or of that, under any form, can cause ambient degradation.