Spain
This comes from Michael Dolan, editor of the Fluoridation Review, November 2021.
The following list is an incomplete record of the largest non-fluoridated cities in Spain derived from Vitoria, I. et al., Fluoride content in tap water in Spain and prevention of dental caries, 2014. Gac Sanit. 28(3): 253-259. This publication does not list the places where fluoride is added to drinking water, but includes the following cities as having less than 0.3 mg/L fluoride.
Non-fluoridated cities and towns in Spain (incomplete):
Alcalá de Guadaira, Alcalá de Henares, Alcobendas, Alcorcón, Algeciras, Alicante, Arona, Arrecife, Ávila, Avilés, Badajoz, Badalona, Barcelona, Burgos, Cáceres, Cádiz, Casteldefells, Castellón de la Plana, Cerdanyola, Cuenca, del Vallés, Chiclana, Cornellá de Llobregat, Córdoba, La Coruña, Coslada, Dos Hermanas, Elche, El Prat de Llobregat, Ferrol, Fuengirola, Fuenlabrada, Gandía, Getafe, Granada, Granollers, Hospitalet de Llobregat, Huesca, Irún, Jerez de la Frontera, La Línea de la Concepción, Las Rozas, Leganés, Lleida, Logroño, Lugo, Madrid, Málaga, Manresa, Marbella, Mataró, Majadahonda, Mérida, Mollet del Vallés, Móstoles, Orihuela, Ourense, Pamplona, Paterna, Pozuelo de Alarcón, Puerto de Sta. María, Reus, Rubí, Sagunto, Salamanca, San Bartolomé Tirajan, San Boi de Llobregat, San Fernando, Sta. Coloma de Gramenet, Santa Cruz de Tenerife, Sta. Lucía de Tirajana, Sanlúcar de Barrameda, San Sebastian Reyes, San Vicente Raspeig, Santander, Santiago Compostela, Sevilla, Siero, Telde, Terrasa, Toledo, Torrejón de Ardoz, Torrelavega, Torrevieja, Valladolid, Vigo, Viladecans, Vila-real, Zaragoza
Fluoridated and non-fluoridated cities and towns in Euskadi/Basque Country
This compilation is based on information obtain from the Euskadi Department of Health, 2020. Municipalities that are all or partially fluoridated are listed as fluoridated, and those with little or no fluoridation are listed as non-fluoridated. Partially fluoridated areas are indicated with (p).
Araba Province
Fluoridated cities and towns: Arrazua-Ubarrundia (p), Legutiano (p), Vitoria-Gasteiz
Non-fluoridated cities and towns: Alegria-Dulantzi, Amurrio, Añana, Aramaio, Armiñon, Arraia-Maeztu, Artziniega, Ayala/Aiara, Banos de Ebro/Mañueta, Barrundia, Berantvilla, Bernedo, Campezo/Kanpezu, El Burgo/Burgelu, El Ciego, El Villar/Bilar, Harana/Valle de Arana, Iruña Oka/Iruña de Oka, Iruaiz-Gauna, Kripan, Labastida, Lagran, Laguardia, Lanciego/Lantziego, Lantaron, La Puebla de Labarca, Leza, Llodio, Moreda de Alava, Navaridas, Okondo, Oyou/Oion, Penacerrada-Urizaharra, Ribera Alta, Ribera Baja/Erribera Beitia, Salvatierra o Agurain, Samaniego, San Millan/Donemiliaga, Urkabustaiz, Valdegovia, Villabuena de Alava/Eskuernaga, Yecora, Zalduondo, Zambrana, Zigoitia, Zuia.
Bizkaia Province
Fluoridated cities and towns: Abanto y Zierbena (p), Alonsotegi (p), Arrigorriaga, Barakaldo, Barrika, Basauri, Bedia, Berango, Bilbao, Derio, Erandio, Etxebarri, Fruiz, Galdakao, Gamiz-Fika (p), Gatika, Getxo, Gordexola (p), Gorliz, Gueñes, Larrabetzu, Laukiz, Leioa, Lemoiz (p), Lezama, Loiu, Maruri, Morga, Muskiz, Ortuella (p). Pleutzia, Portugalete, Santurtzi, Sestao, Sondika, Sopela, Trapagaran (p), Ugao, Urduliz, Zalla, Zaratamo, Zierbena.
Non-fluoridated cities and towns: Abadiño, Ajangiz, Amorebieta, Amoroto, Arakaldo, Arantzazu, Areatza, Artzentales, Arrankudiaga, Arratzu, Arrieta, Artea, Atxondo, Aulesti, Bakio, Balmaseda, Bermeo, Berriatua, Berriz, Busturia, Dima, Durango, Ea, Elantxobe, Elorrio, Ereño, Ermua, Errigoiti, Etxebarria, Forua, Galdames, Garai, Gautegiz de Arteaga, Gernika-Lumo, Gizaburuaga, Ibarrangelu, Igorre, Ispaster, Iurreta, Izuryza, Karrantza, Kortezubi, Lanestosa, Lekeitio, Lemoa, Mallabia, Mañaria, Markina-Xemein, Mendata, Mendexa, Menaka, Mundaka, Munitibar, Murueta, Muxika, Nabarniz, Ondarroa, Orduña, Orozko, Otxandio, Sopuerta, Sukarrieta, Trucios, Ubidea, Zaldibar, Zeanuri, Zeberio, Ziortza-Bolibar.
Gipuzkoa Province
Fluoridated cities and towns: Abaltzisketa, Aia (p), Aizarnazabal, Altzaga, Antzuola, Arama, Aretxabaleta, Arrasate, Astigarraga, Azkoitia, Azpeitia, Beasain, Bergara, Donostia-San Sebastian, Elgeta, Errenteria, Eskoriatza, Gabiria, Gaintza, Getaria, Hernani, Idiazabal, Ikaztegieta, Itsasondo, Lasarte-Oria, Lazkao (p), Legorreta, Lezo, Mutiloa, Olaberria (p), Oñati, Ordizia (p), Orendain, Orio, Ormaiztegi, Pasaia, Segura, Soraluze, Urnieta, Usurbil, Zarautz, Zerain, Zestoa, Zumaia
Non-fluoridated cities and towns: Aduna, Abiztur, Alegia, Alkiza, Altzo, Amezketa, Andoain, Anoeta, Asteasu, Ataun, Baliarrain, Beizama, Belauntza, Berastegi, Berrobi, Bidegoian, Deba, Elduain, Elgoibar, Errezil, Ezkio-Itxaso, Gaztelu, Hernialde, Hondarribia, Ibarra, Irun, Irura, Larraul, Leaburu-Txarama, Legazpi, Leintz-Gatzaga, Lizartza, Mendaro, Mutriku, Oiartzun, Orexa, Tolosa, Urretxu, Villabona, Zaldibia, Zegama, Zizurkil, Zumarraga