Water hardness in Île-de-France
The Île-de-France region has typical water hardness of 25–40°f (French degrees). This hardness is explained by the local geology: Parisian limestone basin.
The main cities concerned: Paris, Versailles, Créteil, Boulogne.
To find out the exact hardness for your municipality, visit qualite-eau.fr (French Ministry of Health portal) or check our complete map of water hardness in France.
Impact of limescale in Île-de-France
With a hardness of 25–40°f, water in Île-de-France is moderately hard to hard. The consequences:
- Limescale on pipes, water heaters and household appliances
- Excess energy consumption of 7 to 25% depending on deposit thickness
- White marks on taps and shower walls
- Dry skin and dull hair
- Reduced lifespan of appliances by 30 to 50%
Read also: 5 signs your water is too hard.
The LIMPEO solution for Île-de-France
LIMPEO, designed by JAEGER SAS, works regardless of water hardness. It converts calcite into aragonite using electromagnetic waves:
- 88% scale reduction — scientifically validated
- 0 chemicals, 0 salt — water retains its minerals
- 0 maintenance for a minimum of 10 years
- Installation in 10 minutes without a plumber
Discover our technology, review the scientific studies and explore our product range. Calculate your savings with our online tools.
FAQ — Hard water in Île-de-France
What is the water hardness in Paris?
The typical hardness in Paris is 25–40°f. The exact value varies by neighbourhood and water source. Check qualite-eau.fr for your precise address.
Does LIMPEO work with water at 25–40°f?
Yes. LIMPEO converts calcite into aragonite regardless of calcium concentration. The harder the water, the greater the savings.