The core activity of HydroTerra Sàrl consists in providing environmental consulting services, particularly in the following areas: Environmental impact assessments (Notice d'impact sur l'environnement, NIE, and Etude d'impact sur l'environnement, EIE), Environmental monitoring during the implementation phase (Suivi environnemental en phase de réalisation, SER), Remediation of contaminated sites (Site pollué, site contaminé, OSites), Waste management (Gestion des déchets, OLED), Soil management (Gestion des sols, OSol), Groundwater management (Eau souterraine, prospection, protection), Surface water management (Eau de surface, eau de chantier), and Compensation measures for nature and landscape (Mesure de compensation, nature, paysage). The company thus offers comprehensive consulting services in the field of environmental protection and management.