Municipality profile · Grand Duchy of Luxembourg
Biwer
Official record of the quality of the water distributed in Biwer. 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
99 / 106
National avg.
20.4°fH
Detailed indicators
Hardness
11.2°fH
Soft
Range: 11.2 – 11.2°fH (4 zones)
Drëpsi certification
✓
AGE audit validated
Nitrates (zone)
100 %
Vulnerable zone · Dir. 91/676/EEC
Position on the French scale
Improve your water
Improving your water in Biwer
Compliant tap water doesn't mean ideal water. Two complementary levers: treat limescale (comfort, appliance lifespan) and purify drinking water (nitrates, pesticides, PFAS).
Soft water — softener optional
At 11.2 °fH, the water in Biwer is soft: a softener isn't essential. It's still useful for maximum comfort (skin, laundry) or to protect a sensitive installation. If in doubt, ask for advice.
Reverse osmosis — pure drinking water
Biwer, 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 — Biwer
+Is the water in Biwer drinkable?
Yes. Biwer 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 Biwer?
Not necessary. The hardness in Biwer (11.2°fH) is low. The water is naturally soft.
+What is the exact water hardness in Biwer?
The average hardness is 11.2°fH. It varies across the 4 measured distribution zones, between 11.2°fH and 11.2°fH.
+Are there nitrates in the water of Biwer?
Biwer, 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).