There may be more of a water surplus in northwest Arkansas than most folks think. In addition to all the rain last week that brought flooding, officials say Benton County Rural Water Authority Number One can`t account for 30 percent of the water it buys. David Fletcher, manager of rural water common operations, said the source of the water loss hasn`t been determined. But he said officials are using test meters to find the source of the missing water. Test meters are used to detect leaks or breaks in water lines, but may also indicate if water is being taken out of the system without being metered. Fletcher said water loss is a normal occurrence with water systems, but the amount lost by Authority Number One is too high.