Officials with the Village of Marathon are telling utility customers they will notice a discoloration of the water coming out of their taps for the next few days. An increase in the iron and manganese levels in the water supply is causing the problem. Work is being done to restore clarity. The utility says the water is safe, but there is an increased risk of staining if it is used to wash clothes. There is no estimate on how long it will take to clear up the discolored water.