Drinking Water Quality


Water flushing recommendations for reopening businesses to protect staff and public health

Updated 6/5/20

To protect staff and public health, state and federal health agencies recommend flushing the plumbing system in buildings where there has been lower than normal water use before reopening.

Buildings that have sat unoccupied for an extended time risk supplying stagnant water to staff. Before it reaches facilities, Bellevue Utilities tests and monitors the water quality carefully to make sure it meets safety standards. This includes regulating the levels of disinfectant in the water system that prevent bacteria growth.

But when water is not regularly used or flushed through, the disinfectant loses its potency. Stagnant or standing water in a plumbing system can increase the risk for growth and spread of Legionella and other surface bacteria.

The Center for Disease Control and the Washington State Department of Health provide clear guidelines to perform proper water system flushing and cleaning to minimize the risk of bacterial growth.

Contact Bellevue Utilities’ Water Quality Office at 425-452-7840 or waterquality@bellevuewa.gov for help interpreting the guidelines. Staff are available 24/7 to help with water quality concerns.

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View your 2020 Drinking Water Quality Report
2020 Drinking Water Quality Report Cover

Bellevue Utilities is pleased to present your 2020 Drinking Water Quality Report. It contains important information about how your drinking water tested for safety and quality in 2019, and the steps we take every day to ensure it remains safe.

Thank you for taking the time to learn about your drinking water. If you have any questions about the information contained in this report, please contact Bellevue Utilities at 425-452-7840 or waterquality@bellevuewa.gov.

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Water Quality Tester
Bellevue’s high-quality drinking water comes from the Tolt River and Cedar River watersheds, and meets or exceeds all state and federal drinking water standards. Stringent testing throughout the year shows that your water is safe.

Bellevue Utilities designs, operates and maintains the city’s water storage and distribution system to make sure your water is safe and reliable every time you turn on the tap. In addition, Bellevue ensures water quality in a number of ways:

  • Ongoing inspection and cleaning reduces leaks and removes accumulated sediments from reservoirs;
  • A cleaning process removes sediments that naturally collect in pipelines;
  • Computer technologies help keep water fresher by reducing the amount of time the water spends in pipes on the way to your home;
  • Water quality testing stations located throughout the water system ensure citywide monitoring for potential contaminants; and
  • A cross-connection control program makes every effort to prevent contaminating fluids from being pulled into the city’s water system.

Water Quality Report

In accordance with the federal Safe Drinking Water Act, the city provides a water quality report each year to all residential and commercial customers. Bellevue’s drinking water meets or exceeds all state and federal drinking water standards, and this report contains information about monitoring, testing results, answers to frequently asked questions and more. A list of additional compounds monitored for but not detected is also available.
If you have questions about the report or your drinking water, please call the Utilities Department at 425-452-7840 or send an email to Utilities Operations and Maintenance.

2020 Water Quality Report

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