Fire hydrant flushing in the City of Knox will take place this week. This is done as routine maintenance and to operate and test the fire hydrants. It also cleans any sediment that settles in the water mains over the summer. The Knox Water Department asks for people to avoid their areas. The stream of water can be hard to see through and very powerful. If you experience discolored water in your home it is still safe, just unpleasant to look at. Turning on your cold water tap into a bath tub is the quickest way to flush out your service line.