For visitors, China’s water problem becomes apparent upon entering the hotel room. The smell of a polluted river might emanate from the showerhead. Need to quench your thirst? The drip from the tap is rarely potable. Can you trust the bottled water? Many Chinese don’t. What about brushing your teeth?s Suggested by the government’s own figures, more than half of the country’s largest lakes and reservoirs were highly contaminated by 2011 that they were no longer suitable for human consumption. China’s more than 4,700 underground water-quality testing stations show that nearly 3/5 of all water supplies are “relatively bad” or worse. Despite Chinese economic growth is striking, the quality of…