Municipality profile · Grand Duchy of Luxembourg
Luxembourg
Official record of the quality of the water distributed in Luxembourg. Data sourced from the open data sets of the Water Management Administration (AGE).
Updated: 2026-05-11
Official municipal sourceScore qualité-eau.lu
National rank
— / 106
National avg.
20.4°fH
Detailed indicators
Hardness
9–35°fH
Variable hardness
Ville de Luxembourg : dureté variable de 9 à 35 °fH selon le quartier (mélange sources locales / SEBES).
Drëpsi certification
✓
AGE audit validated
Nitrates (zone)
100 %
Vulnerable zone · Dir. 91/676/EEC
Position on the French scale
9–35°fH
Ville de Luxembourg : dureté variable de 9 à 35 °fH selon le quartier (mélange sources locales / SEBES).
Improve your water
Improving your water in Luxembourg
Compliant tap water doesn't mean ideal water. Two complementary levers: treat limescale (comfort, appliance lifespan) and purify drinking water (nitrates, pesticides, PFAS).
Hardness varies by district
In Luxembourg, hardness varies from 9 to 35 °fH depending on the district. In hard-water areas (towards 35 °fH), a softener is worthwhile — a home test will settle it.
Reverse osmosis — pure drinking water
Luxembourg, like all of Luxembourg, is a nitrate vulnerable zone, and the European PFAS standard has applied since 2026. An under-sink reverse-osmosis unit removes 95–99% of nitrates, pesticides, PFAS and residues — the safest solution for the water you drink.
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Take the free diagnostic (2 min)Commercial links · partners (DSA art. 26 disclosure)
FAQ
Frequently asked questions — Luxembourg
+Is the water in Luxembourg drinkable?
Yes. Luxembourg holds the Drëpsi excellence certificate awarded by the Water Management Administration, attesting to the compliance of its drinking water installation.
+Should a water softener be installed in Luxembourg?
In Luxembourg, hardness varies from 9 to 35 °fH depending on the area (a blend of sources). In areas supplied with hard water (around 35 °fH), a softener is entirely relevant; an at-home hardness test will confirm the situation in your home.
+What is the exact water hardness in Luxembourg?
According to the official source (geoportail.lu / AGE, status 2022), the water of Luxembourg has a hardness of 9 to 35 °fH, varying by area due to the blend of several resources. There is therefore no single value but a range.
+Are there nitrates in the water of Luxembourg?
Luxembourg, like the entire territory of Luxembourg, is officially classified as a vulnerable zone under the European Nitrates Directive (91/676/EEC). Concentrations at the tap remain within drinking water standards (50 mg/L max).