There is mutual dissatisfaction among policy makers and monitoring specialists about producing what is considered useful information for policy development, implementation and evaluation. Insufficient or inappropriate communication between information users and producers is considered to be a main cause for this water information gap. This paper tests the rugby-ball methodology that has been designed to bridge the gap. The rugby-ball methodology consist of a five step plan that helps policy makers and monitoring specialists to communicate in a proper way and to come to a joint process of defining information needs. The methodology is first tested in a study to assess the information needs for the 4th National Policy Document on Water Management in the Netherlands. From the study it is concluded that the rugby-ball methodology is an important step in bridging the water information gap by better defining what useful information is. The methodology is also improved on the basis of this study by including a structure to support the breakdown of policy objectives into information needs.