The entire UV system is installed outdoors.The installed LIT UV system consists out of 2 banks of 3 modules with twelve 350W lamps each. The lamps are submerged and placed parallel to the flow. The entire UV system is installed outdoor. All electrical cabinets are built in stainless steel, to withstand the Mediterranean climate conditions. Because in summer the outside temperature can reach up to 40°C, the cabinets are equipped with air conditioners. An Automatic Water Level Control System (AWLCS) including a channel slide gate assures a constant water level in the UV channel. Integrated monitoring and control of the water level is essential for the performance of horizontal open channel UV systems. The UV-sensor controls continuously the applied UV intensity. An Ethernet connection with Scada system facilitates remote logging and control of the entire UV system.