The number of Web portals is increasing daily. These Web portals can be grouped into different types according to their purpose. One of these types is 'Information Web Portals' in which data quality is particularly important to users. This paper uses a survey to study the relevance that users place on a series of data quality characteristics in this type of Web portal. To do this, we determined various user profiles based on demographic aspects (gender, age range, level of studies and type of

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... ganization). We also analysed whether each profile prefers some characteristics to others. The results obtained will allow designers and developers to know which data quality characteristics they should place most emphasis on depending on the users of a particular Web portal.