iBATHWATER is a real-scale demonstration project for a new integrated management system for the urban sewerage network. Its application is expected to reduce the impact of discharged untreated rainwater on the natural environment, thereby improving the quality of bathing water during and after episodes of intense rainfall. The two cities where the pilot tests are being carried out are Barcelona – coastal waters – and Berlin – river water.

Expected environmental outcome

reducing the pollutant load of untreated rainwater discharged into the natural environment of urban ecosystems


30 in Barcelona


20 in Berlin