Case C-433/23: Judgment of the Court (Second Chamber) of 18 December 2025 – European Commission v Spain (Calculation of the PE) (Failure to fulfil obligations – Article 258 TFEU – Directive 91/271/EEC – Collection and treatment of urban waste water – Articles 3 to 5 and 15 – Update to the pollution load generated by agglomerations, expressed as a population equivalent (PE)