Guides · Overview
Expert guides
Everything about water in Luxembourg: our long-form articles to help you make the right choices.
AGE data8 minMap of water hardness in Luxembourg
Every municipality in Luxembourg ranked by water hardness. Official AGE data.
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Guide4 minUnderstanding French degrees (°fH)
How hardness is calculated, equivalences with the German °dH, and what the values really mean.
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Guide10 minWater softener vs reverse-osmosis unit: which to choose?
A complete comparison to understand which equipment meets your need, or whether you should combine the two.
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Guide7 minWater softener: the real pros and cons
An honest assessment of the ion-exchange softener: what it truly delivers, its limits, and who it is (or isn't) right for.
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Guide6 minIs a water softener worth it? The 10-year calculation
Purchase, salt and maintenance versus savings on energy, products and appliances: the cost-effectiveness of a softener, with figures.
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Guide7 minReverse osmosis: pros and cons of an RO system
Near-pure drinking water, but wastewater and remineralisation: the full assessment of a domestic under-sink reverse-osmosis system.
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Guide6 minWhat does reverse osmosis really filter? Nitrates, pesticides, PFAS, lead
A detailed list of what reverse osmosis removes — with real reduction rates — and the few things it lets through.
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Guide5 minLimescale in the water heater: +30% on your bill
Why scale attacks the water heater first, what it really costs in energy, and how to prevent it for good.
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AGE data6 minCan you drink tap water in Luxembourg?
Quality, monitoring, limescale, nitrates and PFAS: what Luxembourg tap water is really worth, and when to filter it.
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Guide6 minIs drinking hard water dangerous for your health?
Calcium, magnesium, kidney stones, dry skin: what the science really says about hard water, and why limescale is a household problem, not a health one.
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Guide6 minHard water, dry skin and dull hair: what really happens?
Why hard water dries out skin and dulls hair: neutralised soap, limescale film, worsened eczema. What actually helps.
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Guide6 minHow limescale destroys your appliances
Washing machine, dishwasher, kettle, coffee machine, water heater: what scale really costs your appliances, in overconsumption, breakdowns and lost lifespan.
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Guide6 minWhich water for baby bottles in hard-water areas?
Limescale is not a danger for your baby, but nitrates are. Lightly mineralised bottled water or reverse-osmosis water: how to choose with peace of mind.
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Guide6 minWater softener: what you gain at 1 month, 1 year and 10 years
Immediate comfort, cumulative savings, longer appliance life: what a softener really changes in the short, medium and long term, with figures.
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Guide6 minSoftened water: can you safely drink it?
Sodium intake, sensitive diets, infants: what a softener really changes in your glass, and how to keep flawless drinking water.
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Guide6 minSalt vs salt-free softeners: what are anti-scale devices really worth?
Ion exchange, magnet, electronic, CO₂, polyphosphates: only the salt softener removes hardness. The honest take on what salt-free solutions do — and don't.
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Guide6 minWater softener price in Luxembourg: the complete guide
Purchase, installation, salt and maintenance: all the price ranges for a water softener in Luxembourg, with the return-on-investment calculation.
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Guide6 minOsmosis water: benefits, supposed dangers and remineralisation
Purity, taste and zero contaminants versus the minerals debate: the honest verdict on osmosis water, without the myths about its danger.
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Guide6 minReverse osmosis or filter jug: what each one really retains
A carbon jug improves taste and removes chlorine, but lets nitrates, PFAS and heavy metals through. An RO system blocks them. The honest comparison.
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Guide6 minFiltered tap water vs bottled water: the real maths
Reverse osmosis versus mineral-water packs: the honest maths in euros, CO2 and microplastics for a Luxembourg family.
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Guide6 minWater softener & reverse-osmosis installer in Luxembourg
Have a water softener or reverse-osmosis unit installed in Luxembourg: qualité-eau.lu connects you with approved partner installers. Free quote, nationwide.
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AGE data5 minThe municipalities with the hardest water in Luxembourg
Ranking of Luxembourg municipalities with the hardest tap water (°fH), updated automatically from the official AGE data.
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Not sure what you need?
In 2 minutes, our free diagnostic tells you whether a softener or an osmosis unit is worth it for you, based on your municipality's water.