46As regards the question whether the Kingdom of Spain has failed to fulfil its obligation to prevent the deterioration of the status of the bodies of groundwater in the Doñana protected natural area, in infringement of Article 4(1)(b)(i) of Directive 2000/60, it should be recalled, first of all, that, according to settled case-law, in proceedings for failure to fulfil obligations, it is for the Commission to prove the existence of the alleged infringement and to provide the Court with the information necessary for it to determine whether there has indeed been an infringement, and the Commission may not rely on any presumption for that purpose (see, to that effect, judgment of 5 March 2020, Commission v Cyprus (Collection and treatment of urban waste water), C‑248/19, not published, EU:C:2020:171, paragraph 20 and the case-law cited).
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