Northshore Utility District’s drinking water consistently meets or exceeds state and federal drinking water regulations set by the Environmental Protection Agency (EPA) and the Washington State Department of Health (DOH).

A Drinking Water Quality Report is produced annually and provided to District customers. The report provides important information related to the quality of the Districts drinking water.

a man and woman sitting in an office

The District purchases treated drinking water from Seattle Public Utilities. District customers predominately receive water originating from the Tolt River Watershed located in the foothill of the Cascade mountains, east of Carnation.

The report includes water quality analysis data gathered and compiled from the previous year.

For the most current water quality data, SPU publishes quarterly water analyses.

If you have questions about water quality, please call or email our Water Quality Office at (425) 398-4419,

View the latest Drinking Water Quality Report:

2023 Water Quality Report

NUD Water Quality

Report Archives

Northshore Utility District keeps an archive of drinking water quality reports in PDF format. Press the year that you would like to view: