Xylem Inc., a global water technology leader, today called on the public and private sectors to work together to improve the collection and sharing of water data on this, World Water Day 2018. Despite dramatic improvements in big data collection and the application of that intelligence, the amount of on-the-ground data about water has been declining over the past 40 years. Since 1979, the number of stations reporting streamflow data has plummeted 40 percent, while the number of those reporting precipitation data is down by 30 percent.