Judgment of the Court (First Chamber) of 28 May 2020.#IL and Others v Land Nordrhein-Westfalen.#Request for a preliminary ruling from the Bundesverwaltungsgericht.#Reference for a preliminary ruling – Environment – Aarhus Convention – Directive 2011/92/EU – Assessment of the effects of certain projects on the environment – Public participation in the decision-making process – Irregularities vitiating the procedure for approval of a project – Access to justice – Limitations laid down by national law – Directive 2000/60/EC – EU action in the field of water policy – Deterioration of a body of groundwater – Arrangements for assessment – Right of individuals to take measures in order to prevent pollution – Standing to bring proceedings before the national courts.#Case C-535/18.