Among the public environmental communication tools of urban areas, the website undoubtedly plays a leading role in the dissemination of information, environmental data, forms for accessing online services and documentation. In addition to presenting the city and its environmental policies, the site also plays an important role as an interface with the citizen, facilitating the relationship with the offices that deal, for various reasons, with the urban environment, and encouraging citizen participation in various levels, including in the preparation and implementation of local sustainability programs. By virtue of decades of experience in the field of environmental communication, gained in the creation of the ISPRA institutional site, the Web Portal Service has been contributing for eight years to the Urban Environment Quality Report through research on environmental communication and information on the web of municipal sites. Over the years, the sample of sites analyzed has been considerably enriched and various indicators have been developed, in order to monitor the presence of specific tools, the degree of innovation of the administrations' websites, the quality of the information content and navigability of the sites. This publication aims to provide an overview of the research carried out, with thematic insights on the new tools of web 2.0: open data, social media and smartphone applications, which constitute the new frontier inaugurated by the mobile revolution, increasingly characterizing a new public communication model, characterized by forms of discussion and collaboration with citizens, in particular within local communities.