More than 80 per cent of China's underground water drawn from relatively shallow wells used by farms, factories and mostly rural households is unsafe for drinking because of pollution, a government report says.

The water resources ministry study posted to its website on Tuesday analysed samples drawn in January from 2103 wells used for monitoring in the country’s major eastern flatland watersheds. The ministry said that of those samples, 32.9 per cent were classed as suitable only for industrial and agricultural use, while…