Groundwater contains dissolved minerals, including naturally occurring iron and/or manganese. These minerals settle out of the water and accumulate as sediment in the water mains. Water Utility staff flush the mains on Thursdays during April to August to remove this accumulated sediment and that action can stir up sediment that results in discolored water. Main breaks, contractor work or hydrant flow tests can also stir up sediment in the mains and discolor the water. If your water becomes discolored, run a cold water tap at full force until the water clears, usually in a few minutes. If it doesn’t, call the Water Utility for assistance.