Water Hardness Atlas ZIP / postcode

Tap water hardness in Charente-Maritime

We have published hardness data for 460 cities in Charente-Maritime. The median is 32.9 °fH; the hardest water is in Plassay (38.1 °fH), the softest in Charron (16.4 °fH).

100 % of these cities have hard or very hard water (over 120 mg/L).

Each dot is a place with published data; colour shows the hardness band.

Largest places, hardest first

°fHmg/L
Bourgneuf38380very hard
Matha36.8368very hard
Corme-Royal36.5365very hard
Saint-Romain-de-Benet36.5365very hard
Sablonceaux36.5365very hard
Pont-l'Abbé-d'Arnoult35.8358very hard
Saujon35.7357very hard
Arvert35.7357very hard
Saint-Sulpice-de-Royan35.7357very hard
Breuillet35.7357very hard
Étaules35.7357very hard
Les Mathes35.7357very hard
Chaillevette35.7357very hard
Saint-Augustin35.7357very hard
Corme-Écluse35.7357very hard
Saint-Agnant35.5355very hard
Trizay35.5355very hard
Soubise35.3353very hard
Port-des-Barques35.3353very hard
Saint-Nazaire-sur-Charente35.3353very hard
Le Gua35350very hard
Saint-Just-Luzac35350very hard
Meursac35350very hard
Sainte-Gemme35350very hard
Nieulle-sur-Seudre35350very hard
Saint-André-de-Lidon35350very hard
Rétaud35350very hard
Médis34.9349very hard
Semussac34.9349very hard
Saint-Georges-d'Oléron34.7347very hard
Saint-Denis-d'Oléron34.7347very hard
La Tremblade34.6346very hard
Saint-Jean-d'Angély34.5345very hard
Échillais34.5345very hard
Mirambeau34.5345very hard
Asnières-la-Giraud34.3343very hard
Bourcefranc-le-Chapus34.2342very hard
Burie34.2342very hard
Royan34.1341very hard
Saint-Georges-des-Coteaux34.1341very hard
Thénac34.1341very hard
Saint-Hilaire-de-Villefranche34.1341very hard
Chermignac34.1341very hard
Nieul-lès-Saintes34.1341very hard
Berneuil34.1341very hard
Tesson34.1341very hard
Pérignac34.1341very hard
Saint-Palais-sur-Mer34340very hard
Écoyeux33.9339very hard
Vaux-sur-Mer33.8338very hard
Fontcouverte33.8338very hard
Bussac-sur-Charente33.8338very hard
Marennes-Hiers-Brouage33.6336very hard
Port-d'Envaux33.5335very hard
La Chapelle-des-Pots33.5335very hard
Meschers-sur-Gironde33.1331very hard
Cozes33.1331very hard
Saint-Georges-de-Didonne33330very hard
Aulnay32.9329very hard
Chaniers32.1321very hard
Saint-Germain-de-Lusignan31.9319very hard
Le Château-d'Oléron31.5315very hard
Saint-Trojan-les-Bains31.5315very hard
Beurlay31.5315very hard
La Rochelle31.3313very hard
Saint-Pierre-d'Oléron31.2312very hard
Saint-Genis-de-Saintonge31.2312very hard
Chérac31.1311very hard
Châtelaillon-Plage31310very hard
Pons30.9309very hard
Dolus-d'Oléron30.6306very hard
Le Grand-Village-Plage30.6306very hard
Essouvert28.9289very hard
La Jarrie28.7287very hard
Clavette28.7287very hard
Croix-Chapeau28.7287very hard
Montguyon28.5285very hard
Montlieu-la-Garde28.5285very hard
Chevanceaux28.5285very hard
Tonnay-Boutonne28.4284very hard
Saint-Savinien28.2282very hard
Aytré28.1281very hard
Saint-Rogatien28.1281very hard
Périgny28280very hard
Montendre27.9279very hard
Gémozac27.4274very hard
Muron26.3263very hard
Salles-sur-Mer26.2262very hard
Saint-Hippolyte26.1261very hard
Saint-Christophe25.9259very hard
Puilboreau25.8258very hard
Jonzac25.7257very hard
Cercoux25.2252very hard
Saint-Porchaire25.1251very hard
Saint-Laurent-de-la-Prée24.6246very hard
Saint-Aigulin24.6246very hard
Breuil-Magné24.6246very hard
Yves24.6246very hard
Ciré-d'Aunis24.6246very hard
Sainte-Soulle24.3243very hard
Vérines24.3243very hard
Fouras24.2242very hard
Courçon24.2242very hard
Les Gonds24240very hard
Saint-Jean-de-Liversay23.8238very hard
Nuaillé-d'Aunis23.8238very hard
Angliers23.8238very hard
Angoulins23.7237very hard
La Jarne23.7237very hard
Saint-Médard-d'Aunis23.7237very hard
Saint-Vivien23.7237very hard
Rochefort23.5235very hard
Tonnay-Charente23.4234very hard
Bords23.4234very hard
Cabariot23.4234very hard
Lussant23.4234very hard
Surgères23.3233very hard
La Devise23.3233very hard
La Ronde23.3233very hard
Marans23.1231very hard
Saint-Sauveur-d'Aunis23.1231very hard
Vergeroux23.1231very hard
Saintes23230very hard
Saint-Pierre-La-Noue22.9229very hard
Benon22.8228very hard
Saint-Georges-du-Bois22.7227very hard
Saint-Mard22.5225very hard
Aigrefeuille-d'Aunis22.1221very hard
Le Thou22.1221very hard
Thairé22.1221very hard
Forges22.1221very hard
Dompierre-sur-Mer21.6216very hard
Saint-Xandre21.6216very hard
Andilly21.6216very hard
Saint-Ouen-d'Aunis21.6216very hard
Le Bois-Plage-en-Ré20.8208very hard
Ars-en-Ré20.8208very hard
La Couarde-sur-Mer20.8208very hard
Lagord20.5205very hard
Nieul-sur-Mer20.5205very hard
Marsilly20.5205very hard
L'Houmeau20.5205very hard
Villedoux20.5205very hard
Esnandes20.5205very hard
Sainte-Marie-de-Ré20.2202very hard
La Flotte20.2202very hard
Saint-Martin-de-Ré20.2202very hard
Rivedoux-Plage19.9199very hard
Bussac-Forêt17170hard
Charron16.4164hard

Other places (310)

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