L’entitat dealer proposes if it has to facilitate to l’ajuntament the data base of the users of the service of supply d’aigua once the concession of l’explotació d’un has finished service. As a public service policeman, the data base that is generated, is in principle responsibility of l’ajuntament. L’entitat is configured as person in charge of the treatment and, in the to frequent data base d’una that municipal competence has as a purpose l’exercici d’una, s’haurà of returning to the town council or destroying, once the concession finished.