Abstract
Since 2011, the Centro de Pesquisas e Desenvolvimento - CEPED performs sampling and analysis activities of the waters of the springs that supply the city of Salvador to assess the Water Quality Index (WQI). The WQI is an important indicator of the relationship between use and land cover and water quality in a watershed. The purpose of this paper is to present a study of water quality of rivers Paraguaçu, Joanes, Jacuípe, Ipitanga, which are responsible for the water supply for the population of metropolitan region of Salvador with more than three million inhabitants and highest population density Northeast North. Through this study we can conclude that there is a decrease in water quality in nearby points of urbanized areas due to lack of sanitation, as well as in areas where there is impairment of riparian vegetation cover.
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