Why is the fire hydrant running water?

Why is the fire hydrant running water?
November 14, 2017

When you see a fire hydrant running water, you might think someone opened it by accident or it’s broken. But that might not be the case because sometimes Louisville Water is flushing the hydrant on purpose.


Our water is the highest quality it can be when it leaves our treatment plants, but as water ages in the distribution system, it can change over time. Through careful and extensive water quality monitoring, the Water Quality Distribution department knows the areas in the system that are prone to higher water age. They conduct activities such as hydrant flushing and tank draining to reduce and manage water age in those areas. These activities happen more frequently in the summer months as higher temperatures can cause water to degrade quicker.


“Typically, in the summer we may have about 15 to 25 sites that we have some sort of continuous, ongoing flushing activities,” said Casey Doyle, supervisor of Water Quality Distribution. “Most of these are either fire hydrants, dead end mains or at a tank site to encourage water to turn over in the tank. However, that number can vary depending on a variety of factors including operational changes in the system.”


Over the past several years, these flushing activities happen more frequently in more areas. This is largely due to customers using less water for a variety of reasons such as high efficiency appliances and reduced irrigation demands. To some, flushing may seem like a waste of water, but it is necessary to ensure the highest quality water reaches the customers’ tap!


To make sure that customers know which sites are being monitored, a Water Quality Flushing tag is on all sites Louisville Water is managing. If the flushing is causing a safety issue or property damage, call the number on the tag: 502.569.3676. Louisville Water asks that you do not tamper, adjust, or turn off any hydrant or other apparatus that is flushing. 


And if you see a hydrant with running water that does not have a tag, call customer service at 502.583.6610 or send an email to us through our website at LouisvilleWater.com/other-inquiry.