Rainwater saving and use in households, Bremen
In Germany, for a long time a single fee for both rainwater and wastewater was levied in all communities. After some German court decisions the fee for rainwater was separated from wastewater one and is now based on the extension of impervious property surface (m2), which directs water into the public sewage system. Collecting rainwater on private property with e.g. rain barrel or infiltration system (as for example green space) is then likely to reduce sewage costs due to lower loads to be treated by the treatment plant.