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: 2026-06-11
Official municipal sourceSoft water in Luxembourg, but a nitrate vulnerable zone — a reverse-osmosis unit secures your drinking water.
Installers in LuxembourgScore 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).
Which softener for Luxembourg?
The water here is moderately hard. Tell us your household size for a model recommendation and a price guide.
People in the household
Tick this if several taps/showers often run at the same time — we then pick a duo setup that supplies softened water non-stop.
Recommendation
Suited to a household of 4 people.
Indicative supplied-and-installed price incl. VAT (estimate). Firm quote after a technical visit. Solution provided by our partner adoucisseur-eau.lu.
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.
Not sure what you need?
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).
+Do you need a reverse-osmosis unit in Luxembourg?
In Luxembourg, the water is not especially hard, but like all of Luxembourg the municipality is a nitrate vulnerable zone. An under-sink reverse-osmosis unit remains relevant for drinking water: it removes nitrates, pesticides and PFAS. Quote and fitting via our partner installers.
+Water softener and treatment in Luxembourg: which solutions?
In Luxembourg, the water is not particularly hard (or varies by area): a softener is only useful if a hardness test confirms hard water at your home. The most relevant treatment concerns drinking water — a reverse-osmosis unit removes nitrates and micro-pollutants. Quote and installation via our partners.
+Who should you call to install a water softener in Luxembourg?
qualité-eau.lu does not install directly: we connect you with specialised partner installers in Luxembourg — adoucisseur-eau.lu for softeners, osmoseur.lu for reverse osmosis. They operate in Luxembourg with a free quote, fitting and after-sales service. Request your quote to be contacted.