The Stormwater Experts

Planning of stormwater treatment


Draining stormwater into networked systems continues to be the predominant dewatering process in Germany.

According to statistics of the DWA (German Association for Water, Wastewater and Waste), there was in Germany, in 2001, approximately 486 thousand km length of public system. Of these, about 234,000 km are combined sewers (primarily in southern Germany, share 60-85%), with at least 98,000 km separate stormwater systems (mostly in northern Germany, share 20-40%).

The introduction of stormwater from separate systems into water bodies is currently carried almost exclusively, without prior treatment, significant quantities of pollutants are then released. Meanwhile for combined systems; the amount and quality of treatment is of high standards which makes little sense to the treatment of stormwater . Thus an alternative needs to be considered.


Bodenfilterhandbuch NRW 2003 (Ministerium für Umwelt und Naturschutz, Landwirtschaft und Verbraucherschutz (MUNLV) des Landes Nordrhein-Westfalen (Hrsg.): Retentionsbodenfilter. Handbuch für Planung, Bau und Betrieb. 1. Aufl., Düsseldorf 2003)

Bodenfilter Baden Würtemberg.(Landesanstalt für Umweltschutz Baden-Württemberg (Hrsg.) (2002): Bodenfilter zur Regenwasserbehandlung im Misch- und Trennsystem. Karlsruhe)

Bodenfilter Hessen (Hessisches Ministerium für Umwelt, ländlichen Raum und Verbraucherschutz (HMULV) (Hrsg.) (2007): Niederschlagswasserbehandlung durch Retentionsbodenfilteranlagen)

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Dr.-Ing. Harald Sommer
+49 3342 3595-16