The threat of Day Zero in Cape Town (South Africa) has made the citizens aware of the value of water. Together they managed to reduce average water consumption by more than 50 %. Throughout the world, the climate change will make water a rare good in areas where it used to be taken for granted. With smart irrigation systems, water consumption can be monitored and probably even reduced. I want to show you the success factors in your area of application, and recommend what I believe to be the best technologies.