Map of water hardness in France

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Official data on water hardness and its impact on washing reusable nappies

This interactive and dynamic Ma Boule De Couches® map uses the Hub'Eau API (Ministry of Health / ARS, 2025). The displayed values ​​are automatically updated based on the latest official water samples taken in your municipality. Google can therefore interpret this page as a technical tool based on reliable public data.

The aim of this card is to help parents adjust their cloth nappy washing routine according to the actual hardness of their water: detergent dosage, rinsing efficiency, residue prevention and textile durability.

This is a unique tool in France, specifically designed for families using cloth diapers. Unlike a blog post, this page offers a geolocated and personalized analysis based on certified environmental data.

For even greater accuracy at home, the drop-by-drop test remains the most precise method. It perfectly complements the institutional data shown above.
Understanding water hardnessCalculate my laundry detergent dosage

Water hardness (TH)

Enter an address or a municipality.

Source officielle : Ministère/ARS via Hub’Eau — paramètre 1345 « Titre hydrotimétrique » (°f).

Map of water hardness and its impact on washing cloth diapers

Map automatically powered by Hub'Eau (Ministry/ARS, 2025).

The results shown correspond to the latest official samples available for your municipality.

For even more precise monitoring, we recommend performing a home drip test (kits available in store or online).

Water hardness and the care of washable nappies

Water hardness, expressed in French degrees (°f), indicates the amount of limescale present in your tap water.

It varies by region and directly influences the effectiveness of washing washable nappies.

Hard to very hard water can reduce the action of washing agents and leave residues on fabrics.

This can lead to reduced absorption, persistent odors, or premature fouling.

Conversely, very soft water can cause excessive foam if laundry detergent is overdosed, which complicates rinsing and can leave detergent residue.

Adjusting the dose of laundry detergent to the hardness of your water is essential.

This is the key to effective, long-lasting washing that respects both textiles and your baby's skin.

Any doubts? Need personalized support?

At Ma Boule De Couches®, every household is unique.

We offer tailored support to adjust your washing routine according to your water, detergent and machine.
Dureté de l’Eau en France

FAQs

Water hardness and washing cloth diapers

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1. How can I find out the hardness of my water?

You can consult it via the Hub'Eau map (Ministry/ARS) or measure it with a drop-by-drop test available in store or online.
2. What laundry detergent should I use in hard water?

Opt for a laundry detergent enriched with anti-limescale or sequestering agents and adjust the dose according to the recommendations, without excess.
3. What if my water is very soft?

Slightly reduce the amount of laundry detergent to avoid excessive foam and opt for a long rinse to remove residue.
4. Does water hardness change the washing program?

No, but hard water may require an extra rinse or a longer cotton cycle to ensure optimal results.
  • Service Routine de lavage personnalisée – Couches lavables Ma Boule De Couches
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Laundry Routine – Cloth Diapers

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Are you new to cloth diapers or do you want to optimize your routine?

We offer you tailor-made support: a washing routine adapted to your equipment, the quality of your water and your habits.

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  • Service Routine de lavage personnalisée – Couches lavables Ma Boule De Couches
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Guide complet des couches lavables Ma Boule De Couches®

Discover the complete guide to reusable diapers

Learn everything about TE2 systems, efficient washing routines and real long-term savings. A clear, certified and illustrated guide by Ma Boule De Couches®.

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