The systems of water supply use environmental resources, can cause ambient modifications and contain generating units of residues. The ambient release must all be given for the system, since the captation until the distribution. In accordance with the federal legislation, Resolution CONAMA 001/1986, is necessary that if it makes a Study of Ambient Impact? EIA and also an Environmental impact report? IT RHYMES. Water distribution in Brazil In accordance with given of the IBGE (Brazilian Institute of Geography and Statistics), almost all Brazilian cities have service of water supply, about 97%; 78.6% have service of urban draining and 99.4% have garbage collection. The sanitary exhaustion is the service that represents the lesser tax, more already is offered in more than half 52.2% of the Brazilian cities. The Brazilian on average receives 0,26 m3 (260 liters) from per capita, average water that he varied sufficiently between the regions, in the Southeastern region, the distributed volume reached average of 0,36 m3 per capita, whereas the northeast region did not arrive nor at the half, presenting a per capita average of 0,17 m3. The water distribution in the set of the 8656 districts with general net is made through 30,58 million land linkings, being that 25 million these possess measurers (hydrometers).

The Southeastern region presents the highest index of measurement, with 91% of the measured linkings. The index lowest if finds in the region North, with 37% of measured linkings. Of agreement with the water treatment, 7.2% of the distributed water does not receive no type of treatment, inda today, districts is supplied with underground water, as in the states of Par (89%) and Rio Grande Do Sul (75%), that, even so not treated, it can have good quality. The region North presents a different standard of the too much regions. North-eastern, Southeastern, South and Center-West, more than 90% of the distributed water receives some type of treatment, while in the North this percentage is of 67,6%.