About Us

We are a water resources management utility that combines science and nature to clean water and return it to the Tualatin River, so it can be used again.

We work in partnership with others to safeguard the river’s health and vitality, ensure the economic success of our region, and protect public health for more than 570,000 residents and businesses in urban Washington County.

Looking for a summary of our work? Flip through our Annual Report or read our At-a-Glance document (PDF, 1MB).  


One Water

Spoiler alert: We are using all the water we'll ever have. Whether it comes from a river, lake or melting snowpack, our water is part of a closed system—one water. This one water has been used before and will be used again.

The Process

Surface & Stormwater Management

Resource Recovery

Our Watershed

A watershed is like a great big bowl linking land, water, and people. Our Tualatin River watershed drains 712 square miles and ranges from densely populated areas to agricultural areas and the forests of Oregon’s Coast Range.

Floodplains & Models

Maps & Data

The Tualatin River

Flip through our Annual Report to learn more about what we've done in the last year.



Annual Report

Receive news on what we are doing in the community and our innovative solutions to continue on providing clean water.