When and why are hydrants flushed?

All hydrants are flushed in the spring to ensure that water lines are working properly, and to remove iron deposits from the lines. Hydrant flushing occurs after the first street sweeping operation in order to minimize the amount of winter salt and sand that is washed into the storm sewer system. During flushing, it is normal to notice a temporary drop in water pressure and some water discoloration. Please see the water discoloration FAQ for more information. 

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1. What is the hardness of our water in Rosemount?
2. What causes low water pressure in my home?
3. What causes discolored water?
4. Why does my water have an unpleasant (sulfur) odor? How can I get rid of that?
5. When and why are hydrants flushed?