In accordance with Community legislation, plans were drawn up to construct around 60 water treatment plants at a range of sites in the north of the province of León (Spain), in the Picos de Europa Park, specifically in the following municipalities: Acebedo, Boca de Huérgano, Bonar, Burón, Crémenes, Marana, Oseja de Sajambre, Posada de Valdeón, Prioro, Puebla de Lillo, Reyero and Riano.
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