OLA Information system (©SOERE OLA-IS, AnaEE-France, INRA Thonon-les-Bains, developed by Eco-Informatics ORE INRA Team) has been developed to meet data management needs of lake environmental research observatories in order to make data available for scientific communities. Software architecture of this IS is structured around (i) a shared central component dedicated to generic functions and (ii) modular components specific to lake thematics. The creation of the IS is done by inheriting the core component and using the appropriate modular components. SI is developed with the Java language (version 8). The components are Java projects that follow the structuring of a "multi-module" Maven project. The web interfaces are developed by using the framework JSF with Primefaces user interface component library. Spring and Hibernate frameworks complete the development tools. PostgreSQL is the relational database management system used. (2019-01-18). This information system makes it possible to store and make available physico-chemical data, biodiversity data (phytoplankton, zooplankton, fishes), data from multiparameter probes, chlorophyll, primary production, etc.