Our goal is to prevent the nutrients and harmful microbes load from horse farms to the waterways. We want to implement the research information into practical measures on horse farms to reduce their water pollution. Virtual simulation models are used to help concretize the research data. The models consider not only environmental effects but also economic and social aspects. The goal is reached with specific advice and seminars and workshops. Cooperation between stables, authorities and counseling also increases. The aim is to promote the dissemination of good practices throughout the country to reduce the environmental impact of horse farming.