The amended Grand-Ducal Regulation of 7 October 2002 on the quality of water intended for human consumption make the municipal authorities largely responsible with regard to their inhabitants. Municipal authorities monitor the quality of the water supplied, paying particular attention to supply infrastructures. Municipal authorities must inform consumers at least once a year about the quality of the water supplied. They also provide consumers with advice.
Moreover, municipal authorities must compile a technical file of their supply infrastructures, with an analysis of the critical points in the network, and define measures for minimising risks.
These audits cover the entire distribution network, the aim being to ensure that every person in the Grand Duchy of Luxembourg receives the best possible supply, thereby regaining consumers' confidence in the quality of their drinking water.