This document describes the development of a methodology for analysis of the variables in the water sources particularly the river Bogota, in order to evaluate, test and predict the rate of water pollution, it is proposed raised the necessary aspects for processing data so that it can be extracted from the database that has the CAR. a review of some previous work and the importance of determining how they will be measured indices water quality as proposed in this work scope is done, the approach of the most important variables are to be considered for this research, according to procedures standard data analysis.