European Commission 13 December 2019, COMMISSION STAFF WORKING DOCUMENT EXECUTIVE SUMMARY OF THE EVALUATION of the Council Directive 91/271/EEC of 21 May 1991, concerning urban waste-water treatment

Executive Summary The Evaluation is based on a comprehensive literature review, including European Court of Auditor reports, implementation reports, the European Environment Agency’s work, scientific studies and grey literature. Stakeholders were closely involved throughout the process: in addition to a 14-week public consultation, four expert workshops and a stakeholder conference were held.