The study had as objective to investigate the levels of physical losses of water of the supplying system of Rondonópolis-MT operated by the concessionaire Service of Ambient Sanitation of Rondonópolis SANEAR. The data used for this study are of production and consumption of water in Rondonópolis, in the period of years of 1998 the 2003, supplied by SANEAR for the level of the zones of water production of the city. Through statistical analyses and resources of Geographic Information Systems, this data has been used for to evaluate and to distribute in the Rondonópolis space the rate of physical losses of water of this system and to identify seasonal variations of the levels of water consumption. As main results, they had been verified: a) verification of the seasonal variations in the levels of water consumption of the city being it 5% below of the annual average in the period between the April and January months and 5% above of this average in the period of August the December; b) verification of high rate of physical losses of water in the supplying system of Rondonópolis which exceed 50% in the majority of the 16 zones of water production of the city and in two of them had arrived about 90%. In average the losses of water had been of 55% in Rondonópolis for the two analyzed years, exceeding the average rate of Brazil (40%) and of the Center-West Region (44%) of losses of invoicing (PMSS, 2004:19).
System of Water supply; Basic Sanitation; Geographic Information Systems
