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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

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Learn about Portland's Watersheds

The City of Portland sits at the confluence of two of the nation's major river systems: the Columbia River and the Willamette River. Native salmon, steelhead and other fish and wildlife species live within Portland’s urban boundary, and also migrate through Portland to other parts of the Willamette River Basin, Columbia River Basin, and beyond.

Link to Johnson Creek watershed page Link to Tryon Creek watershed page Link to Fanno Creek watershed page Link to Willamette River watershed page Link to Columbia Slough watershed page

 The city is divided into these primary watersheds:

Everyone in Portland lives in a watershed, and many of our daily actions impact the health of our rivers and streams. Portland is a leader in restoring urban waterways, using natural approaches to manage stormwater, and working to recover endangered species. Environmental Services is committed to protecting and restoring our watersheds for clean water, lower infrastructure costs, and making our city more livable
and healthy.


Columbia River Watershed

All of Portland’s local watersheds are part of the Columbia River Basin

Fanno Creek Watershed

Fanno Creek begins in southwest Portland and flows to the Tualatin River

Johnson Creek

The creek crosses several jurisdictions before entering the Willamette River near Milwaukie

Tryon Creek Watershed

Tryon Creek flows through parts of southwest Portland to the Willamette River near Lake Oswego

Tualatin West Watershed

An area of Portland’s West Hills that drains to the Tualatin River

Watershed Management Plan

Protecting natural resources and restoring critical ecosystems

City Green Blog

Updates on Environmental Services green infrastructure and watershed work