Data of type physico-chemistry measured on L'Ouvèze basin within the framework of the FONTAINE DE VAUCLUSE observatory, that is part of the KARST observatory network. The KARST observatory network aims to strengthen knowledge-sharing and to promote cross-disciplinary research on karst systems, in the framework of the OZCAR Critical Zone network Research Infrastructure.Data consist in 3 time series on 1 station(s). The measured parameters are: Conductivity (µS/cm), Total organic carbon (TOC) (mg/L), Water temperature (°C).Measurements start on 17-12-1990 and end on 14-03-2018