The “National monitoring programme for substance load in swiss watercourses” (NAWA-Fracht, formerly known as NADUF) program was initiated in 1972 as a cooperative project between three institutes: + [Federal Office for the Environment (FOEN)](https://www.bafu.admin.ch/bafu/en/home.html) + [Swiss Federal Institute of Aquatic Science and Technology (EAWAG)](https://www.eawag.ch) + [Swiss Federal Institute for Forest, Snow and Landscape Research (WSL)](https://www.wsl.ch/en.html) (since 2003) The following institutes participated later: + [Amt für Umwelt und Energie des Kantons Basel-Stadt (AUE)](https://www.aue.bs.ch) + [Federal Institute of Metrology (METAS)](https://www.metas.ch/metas/en/home.html) With the NAWA-Fracht program, the chemical-physical state of Swiss rivers as well as intermediate-term and long-term changes in concentration are observed. Furthermore, it provides data for scientific studies on biological, chemical and physical processes in river water. The NAWA-Fracht network serves as a basic data and sampling facility to evaluate the effectiveness of water protection measures and for various scientific projects. The analysis of chemical parameters is largely carried out in Eawag's service laboratory AuA together with the trainees. ### Data from 2024 to 2025 The physical data for the years 2024 and 2025 are provisional. Accordingly, the chemical data are not yet definitive.