This discussion paper is about generic benefit of transboundary aquifer assessments as carried out nowadays all over the world. The paper addresses relevance of assessed information & gained knowledge for others (than the involved aquifer states) in terms of replicability and lesson learned. Once the relevant knowledge is identified, it needs to be disseminated to the potential user in the most appropriate way. The paper discusses current practice and recommends further methodological development, harmonisation and use of contemporary information and communication technology.