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Tap water hardness in Yonne

We have published hardness data for 414 cities in Yonne. The median is 28 °fH; the hardest water is in Festigny (37.8 °fH), the softest in Cudot (4.2 °fH).

91 % 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
Cheny37.6376very hard
Seignelay37.1371very hard
Joux-la-Ville33.9339very hard
Valravillon33330very hard
Ligny-le-Châtel32.5325very hard
Maligny32.5325very hard
Pontigny32.5325very hard
Champlay32.1321very hard
Collemiers32320very hard
Treigny-Perreuse-Sainte-Colombe31.9319very hard
Étais-la-Sauvin31.9319very hard
Saint-Agnan31.7317very hard
Villethierry31.7317very hard
Saint-Valérien31.3313very hard
Villebougis31.3313very hard
Villeneuve-la-Guyard31.1311very hard
Courson-les-Carrières31.1311very hard
Brannay31.1311very hard
Cézy30.9309very hard
Ouanne30.8308very hard
Saint-Julien-du-Sault30.5305very hard
La Celle-Saint-Cyr30.5305very hard
Vermenton30.4304very hard
Marsangy30.4304very hard
Saints-en-Puisaye30.4304very hard
Villeblevin30.3303very hard
Coulanges-sur-Yonne30.3303very hard
Senan30.1301very hard
Saligny30300very hard
Vinneuf29.9299very hard
Chaumot29.7297very hard
Mailly-le-Château29.7297very hard
Héry29.4294very hard
Armeau29.4294very hard
Chéroy29.3293very hard
Saint-Martin-du-Tertre29.3293very hard
Nailly29.3293very hard
Domats29.3293very hard
Montacher-Villegardin29.3293very hard
Courtois-sur-Yonne29.3293very hard
Sépeaux-Saint Romain29.3293very hard
Vallery29.3293very hard
Deux Rivières29.2292very hard
Gron29.2292very hard
Vincelles29.2292very hard
Malay-le-Grand29.1291very hard
Maillot29.1291very hard
Chaumont29.1291very hard
Noé29.1291very hard
Rosoy29290very hard
Saint-Clément28.9289very hard
Véron28.9289very hard
Michery28.9289very hard
Neuvy-Sautour28.9289very hard
Cuy28.9289very hard
Saint-Denis-lès-Sens28.9289very hard
Serbonnes28.9289very hard
Gisy-les-Nobles28.9289very hard
Noyers28.8288very hard
Brienon-sur-Armançon28.6286very hard
Charny Orée de Puisaye28.3283very hard
Pont-sur-Yonne28.3283very hard
Égriselles-le-Bocage28.3283very hard
Flogny-la-Chapelle28.3283very hard
Châtel-Censoir28.2282very hard
Montholon28.1281very hard
Thorigny-sur-Oreuse28.1281very hard
Bléneau28.1281very hard
Villeneuve-l'Archevêque28.1281very hard
Saint-Sauveur-en-Puisaye28.1281very hard
Rogny-les-Sept-Écluses28.1281very hard
Saint-Privé28.1281very hard
Soucy28280very hard
Pourrain28280very hard
Diges28280very hard
Escamps28280very hard
Cerisiers27.8278very hard
Étigny27.8278very hard
La Chapelle-sur-Oreuse27.7277very hard
Auxerre27.6276very hard
Champigny27.6276very hard
Sergines27.6276very hard
Coulanges-la-Vineuse27.6276very hard
Champs-sur-Yonne27.5275very hard
Escolives-Sainte-Camille27.5275very hard
Villeneuve-sur-Yonne27.4274very hard
Augy27.4274very hard
Ancy-le-Franc27.4274very hard
Parly27.4274very hard
Le Val d'Ocre27.4274very hard
Saint-Sérotin27.4274very hard
Joigny27.3273very hard
Piffonds27.2272very hard
Lézinnes27.1271very hard
Monéteau26.8268very hard
Appoigny26.8268very hard
Gurgy26.8268very hard
Villemanoche26.7267very hard
Chablis26.5265very hard
Les Vallées de la Vanne26.5265very hard
Arces-Dilo26.5265very hard
Courlon-sur-Yonne26.4264very hard
Chemilly-sur-Yonne26.3263very hard
Turny26.3263very hard
Beaumont26.3263very hard
Paron26.2262very hard
Bussy-en-Othe26.2262very hard
L'Isle-sur-Serein26.2262very hard
Saint-Florentin26260very hard
Laroche-Saint-Cydroine26260very hard
Migennes25.9259very hard
Perceneige25.7257very hard
Saint-Bris-le-Vineux25.5255very hard
Vergigny25.2252very hard
Tonnerre25.1251very hard
Ravières25.1251very hard
Vallan25.1251very hard
Chéu25.1251very hard
Germigny25.1251very hard
Épineuil25250very hard
Sens24.9249very hard
Brion24.9249very hard
Lindry24.6246very hard
Champlost24.6246very hard
Les Bordes24.6246very hard
Perrigny24.5245very hard
Dixmont24.5245very hard
Fleury-la-Vallée24.4244very hard
Charbuy23.8238very hard
Courgenay23.8238very hard
Tanlay23.7237very hard
Chailley23.6236very hard
Épineau-les-Voves23.2232very hard
Saint-Fargeau22.8228very hard
Poilly-sur-Tholon22.7227very hard
Venizy22.6226very hard
Bonnard22220very hard
Bassou22220very hard
Charmoy19.1191very hard
Guillon-Terre-Plaine18.5185very hard
Toucy18.2182very hard
Champignelles18.2182very hard
Mézilles18.2182very hard
Mont-Saint-Sulpice15.6156hard
Ormoy15.6156hard
Avallon10.5105moderately hard
Sauvigny-le-Bois9.898moderately hard
Chamvres9.898moderately hard
Magny8.989moderately hard
Quarré-les-Tombes8.989moderately hard

Other places (264)

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