A Parliamentary initiative (10.503) launched by National Councillor Adèle Thorens Goumaz (Greens) calls for rainwater to be used more extensively for purposes that do not require drinking water quality. The initiator is hoping to reduce the consumption of drinking water as a result. In addition, the initiative is seeking to increase the amount of rainwater that percolates into the soil. Eawag research projects show that the collection and storage of rainwater is costly, as is any purification required. On the other hand, percolation of rainwater into the soil can help alleviate incidents of flooding.