Flushing

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Uni-directional Hydrant Flushing Program

Gallatin Public Utilities has approximately 1,816 fire hydrants in its service area. These hydrants are flow-tested and maintained every year to ensure they are in good working order. Our hydrant flushing program is an integral part of our ongoing efforts to deliver the safest and highest quality water possible. This program is designed to improve the quality of water coming out of customer's taps, by flushing out possible sediment build up and any harmless impurities. The uni-directional flushing is carried out by Gallatin Public Utilities staff, who systematically open and close fire hydrants on one section of main at a time, letting the water run at a high velocity until sediment is carried out and the water is clear. This testing typically starts in the spring and ends in the fall.

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Frequently Asked Questions

Why is hydrant flushing necessary?
Hydrant flushing is a routine process of cleaning the piping of a water distribution system. This flushing enhances water quality by flushing sediment from the main lines, helps maintain chlorine residuals through out the distribution system, and verifies the proper operation of hydrants. In other words flushing improves the overall quality of water in the distribution system.

What should I do when the personnel are flushing hydrants in my neighborhood?
If you see a crew flushing a hydrant on your street, avoid running water, using the dishwater, or washing light colored laundry until flushing is done. Also if you see hydrant flushing crews working in the area, please drive carefully and treat them like any other road construction crew.

What affect will hydrant flushing have on my water?
You may notice a temporary reduction in water pressure during flushing. During and immediately following flushing the water may look discolored. If discolored water occurs, it is caused by iron or manganese particles being dislodged from the water main. If discolored water occurs, it is not a health hazard. However, the discolored water may stain porcelain and laundry. If you encounter discolored water, shut the faucet off and wait several minutes. After waiting, run the cold water for a few minutes allowing fresh water to work its way in to your pipes. If the water is clear it is okay to use. If not, wait a few more minutes and then check it again. If the discolored water persists more than 24 hours please call the Gallatin Water Treatment Plant at (615) 452-5010. This discoloration only affects the appearance of the water, it does not affect the water quality.

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Notice

  • Avoid washing clothes while crews are flushing hydrants in your area.
  • Do Not wash if your water is discolored

If you inadvertently have washed your clothes in discolored water, DO NOT USE BLEACH. This will set the stains in your laundry. Gallatin Public Utilities keeps a supply of a special chemical which will help remove these stains. Customers may call the Gallatin Water Treatment Plant at (615) 452-5010 to obtain the chemical (free of charge).