Since 2007, Infrax has been responsible for the operation, maintenance and development of all utility mains in the territory of the municipalities that were previously served by Infrax Limburg, Iveg, Infrax West or PBE. Infrax fulfills a number of 'public service obligations’. It draws up an annual action plan to ensure that customers cut their electricity and natural gas usage by a pre-defined percentage. The campaigns promoting Rational Use of Energy (RUE) are an excellent tool for this purpose. Along the same lines as the RUE grants, Infrax is also paying grants for Rational Water Use (RWU) in municipalities where it runs the sewerage system.