Maintaining high quality water with flushing


Your Roseville Utilities works to ensure high-quality water. One way we do that is to flush the water lines as part of our routine operations and maintenance.

Over time, tiny bits of sediment and organic material found naturally in our source water from Folsom Lake settle and accumulate inside distribution pipes. When we conduct unidirectional flushing, we close values, isolate sections of the pipe, and use high-pressured water to clear out material using an opened fire hydrant.

Similar to how we brush our teeth every day, cleaning the inside of our water mains on a routine basis is an essential part and planned investment in maintaining the health of Roseville’s water system.

There are several ways to conduct flushing. We chose the unidirectional method because it is a better, more effective approach to clearing out sediment, requires less water over more traditional methods, and impacts to customers are far less.


Beginning this fall, we will begin work to flush pipes in your neighborhood. This will last up to three weeks. We will conduct flushing during normal business hours.

When we schedule the work, customers will receive a door hanger several days in advance informing you of the date and time flushing will occur.

What to expect

  • Water flushing is safe and your water is safe to use. During and up to a day, customers might see temporary discolorations, taste, and odors from flushing. Do not be alarmed—this is normal. 
  • You should not see any changes to your water supplies including water pressure – just temporary changes in water characteristics.
  • Because we are flushing pipes throughout your neighborhood, changes in water quality might be intermittent.
  • You might see water flowing from our hydrants when we are conducting flushing activities. This is part of the process.
  • Crews will be on residential streets and near hydrants. We do not anticipate any closures to streets. However, please drive carefully when crews are in the area.

Question and Answer

Is flushing safe? Yes. Temporary discoloration during this process only affects the appearance of the water – it does not cause a health or safety risk.

What should I do on the days flushing occurs? To prevent discolored water from entering the household plumbing, avoid using tap water or running appliances (like washing clothes) until flushing is complete. While discolored water is present, customers might choose to drink bottled water or water from their stored emergency water supplies. If you notice discolored water, run cold water from one faucet for 2-3 minutes to see if it clears. If it does not clear, wait an hour and try again.

For more information

Please contact (916)774-5750 for more information or if you have any questions.