The City flushes water hydrants each spring. This can lead to stagnant water and sediment buildup in the water mains.
Flushing hydrants ensures good water quality throughout the system. Hydrant flushing begins at the first week of May and continues through the end of May, weather permitting. Crews flush from 7 a.m. to 3:30 p.m. Monday through Friday.
The change in water flow patterns resulting from hydrant flushing may stir up mineral deposits in City water mains. During hydrant flushing, it is not unusual to periodically experience discolored water, pressure changes and/or an increased chlorine odor.
Sediment present in the water is not a health issue, but it may impact the taste, odor or color of the water. If discolored water is present, you may correct the problem by opening all cold water faucets and allowing them to run at the same time until the water clears. Residents are also encouraged to check the color of their water prior to doing laundry. Discolored water may stain clothes, particularly whites.
For more information about hydrant flushing and other water quality questions, contact the Public Works Dept. at 651-490-4650.
2026 Spring Flushing Zones Map(PDF, 1MB)
FAQs
Why does the city flush hydrants?
Hydrant flushing:
- Improves drinking water quality by removing sediments from the mainline through the hydrant
- Identifies any issues with hydrant and related valves
- Determines weaknesses in the water distribution system
- Identifies inadequate water volumes and pressures in the main lines
When does the city flush hydrants?
The city typically flushes in late April.
Why is my water discolored?
Tap water can sometimes change color after hydrant flushing. This is normal and safe for drinking. When we open hydrants, the water in the mainline flows out at a high velocity. This dislodges sediment particles from the pipe. The discoloration is the suspended iron and manganese particles mixing with water that has not had time to settle.
What should I do if my water is discolored?
Run water through your faucets for a few minutes to clear the pipes. Discolored water is safe for drinking but may discolor your laundry.