Data journalism is a form of storytelling where elements of text, interactive graphics and datasets are often combined into one interactive journalistic project or service. In addition, the general public are often encouraged to submit their own data for publication within the service. Data journalism is not a new field, but due to the expensive production process and the advanced skills needed by journalists, it is still relatively uncommon in the Swedish media landscape. This study is based on a joint research project together with SVT Pejl, the data journalism department at the Sveriges television (SVT). The main aim of this paper is to explore this emerging form of interactive journalism based on public sector data, and how the general public engages with it. This paper is based on a four-month case study in 2011 and 2012 of SVT Pejl and “Brottspejl”one of its data journalism services. An action research approach has been used, and the methods were in-depth interviews and a web-based survey.