Water hardness in Marly (canton of Fribourg): 32.5°fH, quality index 5/10. Official Swiss cantonal data.
✓ Compliant with sanitary standardsMarly has hard water (32.5°fH). Weekly descaling is recommended. A water softener becomes worthwhile above 30°fH.
Swiss tap water is subject to the federal Food Act (LDA/LEDAl) and the Ordinance on drinking water (OPBD). The sanitary compliance indicator shows whether the latest cantonal analyses found any non-conformities on parameters such as bacteriology, nitrates or heavy metals.
The TH (Total Hardness) measures calcium and magnesium content. Below 15°fH: very soft. From 15 to 25: soft. From 25 to 32: moderately hard. From 32 to 42: hard. Above 42: very hard. Marly's water is hard at 32.5°fH.
Maintenance budget: ~£91/year
For 2 persons, water at 32.5°f deposits around 1.6 kg of limescale per year in your appliances. Estimated cost in descalers, salt and filters.
Calcium: ~52 mg per litre
Your water provides 52 mg of calcium/L, which is 5% of the recommended daily intake.
Filter jug: cartridge every 4 months
At 32.5°f, replace the cartridge every 4 months. An under-sink filter lasts 6 to 12 months.
The tap water hardness in Marly is 32.5°fH, corresponding to hard water. In comparison, the Suisse romande average is 24°fH and the Fribourg cantonal average is 25°fH.
Yes. The water in Marly is sanitary compliant (Swiss Food Act LDA and Drinking Water Ordinance OPBD). The hardness of 32.5°fH affects taste and appliance maintenance, not safety. Swiss tap water is subject to strict regular monitoring by cantonal authorities.
With 32.5°fH, a water softener is a worthwhile investment in Marly. Limescale reduces the lifespan of boilers, washing machines and coffee makers and increases energy consumption by 10 to 15% per mm of scale. An anti-scale filter is a minimum at this hardness level.
A hardness of 32.5°fH corresponds to approximately 52 mg of calcium per litre, or 5% of the recommended daily intake. This calcium is not dangerous; hard water can even contribute to your daily calcium intake.
Water in Marly is distributed by cantonal utilities in the canton of Fribourg (EauSud, SINEF, ABV, OIKEN, SIG, Viteos or municipal services depending on the city). Source: Commune de Marly 2025.
Data: official cantonal utilities (EauSud, SINEF, ABV, OIKEN, SIG, Viteos, municipal services) (2024–2026).