Loveresse’s wastewater treatment plant (WWTP) treats the wastewater of the municipalities in the catchment area of the Syndicat des Eaux de Tavannes et Environs with a total population equivalent of around 7000. Like all WWTPs in the Canton of Berne, it is subject to the condition imposed by the Office for Water and Waste of the Canton of Berne that the conditions of discharge of the treated wastewater into the receiving watercourse be complied with even in the event of a power failure. WWTP Loveresse therefore had to install an emergency power supply and integrate it into its electrical switchgear.The choice fell on a diesel-operated emergency power generator, which is often used for such cases in public buildings and facilities. This is supported on the one hand by the high energy density of the diesel and on the other by the secure supply situation. This should become even safer in the event of power failures in the canton of Berne, as the canton is currently working out a concept to ensure that the necessary diesel deliveries are guaranteed at any times.