Judgment of the Court (Sixth Chamber) of 6 October 2021.#European Commission v Italian Republic.#Failure of a Member State to fulfil obligations – Article 258 TFEU – Directive 91/271/EEC – Collection and treatment of urban waste water – Articles 3 to 5 and 10 – No collecting systems for urban water in certain agglomerations – No secondary treatment or equivalent treatment of urban waste water in certain agglomerations – Construction and operation of treatment plants – Control of discharges from such plants – Sensitive areas – More stringent treatment of waste water.#Case C-668/19.