China expects to bring potable water to 100 million rural residents by 2010, a state newspaper said, but that would still leave more than 200 million people with unsafe supplies.Plagued by droughts and shortages, China is unable to provide clean drinking water to 360 million people, with supplies affected by everything from salinity to arsenic, China Daily said Monday.Too much fluoride in the water affects more than 63 million people in northern China, while salty water is a problem for 38 million in northern and eastern coastal regions, it said.