Each spring, the Marion Water Department flushes the water system to remove sediment from the mains and to exercise and check the operation of the City’s fire hydrants. Flushing typically begins sometime in April (weather permitting).
During this time, Marion residents may notice some temporary discoloration of the water and should postpone laundry until it clears and minimize the use of hot water to prevent build-up within the water heater. The rusty color in the water is due to the accumulation of iron sediment in the water mains and is not harmful.
Questions may be directed to the Water Department office at (319) 743-6310.
Original source can be found here.