Management of water for household, industry and commercial use is one of the main challenges that urban centres face. Many cities around the world increasingly face water stress because of changing climate conditions. One such city is Cape Town, South Africa. Increasingly, policy makers will have to adopt innovative approaches to maximising the use of dwindling resources like water. This will call for increased use of knowledge from scientific research. In the case of Cape Town, one attempt at keeping the taps wet is to tap storm water.