Storm water overflows
Assessment of impact of storm water overflows from combined waste water collecting systems on water bodies (including the marine environment) in the 28 EU Member States (2014-2015)
Client: DG Environment
The reduction of the number of occurrences and volume of storm water overflows from sewerage systems is essential to achieve full compliance with the Urban Waste Water Directive (UWWTD), and thus to the protection of Europe’s waters. The overall objective of this project was to provide DG Environment with an overview of how storm water overflows are regulated in EU Member States and their impacts.
The project had four tasks:
- Under Task 1.1, Milieu provided an overview of how storm water overflows are regulated at EU and international level, as well as in the USA. Milieu also made a comparative assessment between the legal and regulatory framework in the EU and in the USA.
- Under task 1.2, Milieu provided an overview of how storm water overflows are regulated at Member State level. This included a short analysis of the content of national legislative and guidance documents in Member States which implement EU and international legislative and policy documents.
- Under Task 1.3, Milieu provided a qualitative assessment of the occurrence of storm water overflows in the EU Member States. The assessment was based on the available data, which was obtained by desk research and a survey with Member State experts.
- Under Task 1.4, Milieu conducted a scientific literature review on the different impacts of storm water overflows, with a particular emphasis on the potential risks for human health.
For each of the tasks, Milieu prepared a reference chapter, including the actions proposed to the European Commission and the Member States to reinforce their policies, as well as a document for a layman public.