Watershed FAQs

Learn more about the Tualatin River Basin's history, characteristics, and people.

What is a watershed?

A watershed is the entire area draining into a specific body of water, such as a river or creek. Watersheds are composed of uplands, riparian areas, wetlands, lakes, streams, and rivers. One watershed is separated from another by ridgetops.


Quantifying the Tualatin Basin.

People & Community

Who lives, plays, and works in the Tualatin Basin?

Water Quality

Learn more about our surface water!

Everything Else

Here you’ll find some basic facts about our basin locale including streams, wildlife, and climate.