Web Portals appeared in the late 1990s as a new type of Internet website architecture specifically designed to provide personalized online services. The success of Web portals depends on their ability to provide accurate content and useful services specifically tailored to individual users according to their requirements. Data Quality is a critical issue in today's interconnected society. From the software point of view there is a widely accepted standard proposed by ISO/IEC (the ISO/IEC 9126) which proposes a quality model for software products. However, until now a similar proposal for data quality of web portals has not existed. In order to assess the success of a website, a quality model highlighting relevant properties of the website and specifying how to measure them is needed. In this paper a brief overview of some proposals of web portal quality is presented.

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