On Tuesday 24 March 2026, the City of Luxembourg (VdL) presented key figures on drinking water supply and wastewater management for 2025, as part of World Water Day, celebrated annually on 22 March.
According to VdL, the total supply of drinking water reached 8,415,537 m³ in 2025, with an average daily consumption of 21,432 m³. The average per capita daily consumption decreased from 183 litres in 2015 to 163 litres in 2025, representing a reduction of 11%. “It should be noted that this average includes not only household consumption but also that of industries, offices, secondary schools, swimming pools and other infrastructure within the city,” VdL stated.
VdL noted that the water supply network extended over 447 km at the end of 2025, covering the entire city. During the year, 4.8 km of ageing pipelines were replaced and 1.5 km of new pipelines were installed. The rollout of smart meters also continued, reaching 57% of households in 2025, compared to 37% in 2024.
The city invested approximately €354,000 in water quality monitoring, with 4,737 chemical and microbiological analyses carried out across sources, reservoirs and the distribution network.
Regarding wastewater, VdL reported that the sewerage network extended to 708 km by the end of 2025, an increase of 4 km compared to the previous year. Maintenance works included the cleaning of 419 km of pipes, as well as the emptying of over 20,000 siphons and more than 4,200 drainage channels.
VdL added that 520 metres of pipelines were rehabilitated and 3,450 metres reconstructed to ensure proper wastewater flow and infrastructure reliability.
The Beggen wastewater treatment plant treated 18.3 million m³ of wastewater in 2025, producing 7,308 tonnes of sewage sludge. The sludge was processed through incineration in Luxembourg, Germany and Belgium.
