The objective of the study „improvement of the contribution of agribusiness in respect of good status for water bodies of the Massif Central” is to provide some control on the environmental impacts of business food chains "Meat" and "Milk". A sample of 18 companies, voluntarily heterogeneous to cover up cases, has been formed to study their impact on the water body. The modelling tool applied is the pression -impact model PEGASE. The results have highlighted the vulnerability of water bodies to nitrogen and phosphorus pollution. The flow of the water body and the collective treatment plant has also a major role in the impact. Above all, this program illustrates the specificity of each pair "firm –water body “and therefore the need for companies to conduct a project approach that should define a solution "tailored" to treat effluents. A guide was written to help companies to apply the project approach to defining a solution effluent management, and to make an effective and long-term investment.
