Occasionally open fire hydrants can cause some rust and scale products, which normally adhere to the inside of the water mains, to break away. This sediment disturbance may cause water to appear cloudy or dirty. Water main repair or construction can also cause this temporary inconvenience. If this condition occurs in your system, allow the cold-water tap to run until the water clears. This should occur within five minutes. If the condition persists, call the Gurnee Public Works Department at (847) 599-6800.