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Water sample locations for Fanno Creek, Oregon

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: July 13, 2026 at 06:22 PM | Dataset Last Updated: November 17, 2020 at 12:00 AM
Fanno Creek is a tributary to the Tualatin River and flows though parts of the southwest Portland metropolitan area. The stream is heavily influenced by urban runoff and shows characteristic flashy streamflow and poor water quality commonly associated with urban streams. This data set represents the locations where water-quality samples were collected.

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