This paper is based on the survey of 47 French SMEs. It shows that the most efficient channel to spur SMEs to prevent pollution is direct contact with their stakeholders. Thus, a web-based environmental system that aims to increase the environmental awareness of these small firms should be targeted towards local public or private organisations and help them to organise projects that aim to distribute environmental information instead of targeting only the small firms themselves. Specifications are proposed to design such an information system.