Our Future Water Supply

Tualatin Valley Water District (TVWD) and the City of Hillsboro are partnering to develop the mid-Willamette River at Wilsonville as an additional water supply source. Other water providers in the region are also looking at their options for future participation. There is enough water for today—but steps need to be taken now to have an adequate supply to meet future demands and provide greater reliability. Developing an additional water supply through a partnership supports the region’s plans for responsible growth within the urban growth boundary.

Although effective water conservation programs and newer low water use appliances mean Washington County homes and businesses are using 15% to 20% less water than a decade ago, conservation alone is not enough to meet this future demand.

Anticipating the long-term need for a new water source, TVWD and Hillsboro began years ago to prepare for this need and the necessary investment. Rates will go up, but this approach reduces the need for steep rate increases to pay for investments in reliable supply.

Why the Willamette River?

The mid-Willamette River at Wilsonville offers significant benefits: excellent finished water quality, redundancy, ownership and control of the supply, year-round reliability, and better value.

Willamette Water Supply Timeline

The new Willamette Water Supply System will be one of Oregon’s most important projects—designed to supply water to more than 300,000 residents and some of the state’s largest employers for the next 100 years. Planning for the Willamette Water Supply is underway, but it will take over a decade to design and build the system. For this major project, planning, engineering, financing, public outreach and permitting will need to be strategically coordinated early in the process.

Our Reliable Water

Protecting Public Health

"The new mid-Willamette water supply provides reliability to protect public health and safety. The region will have multiple sources of water – if one source is restricted or unavailable, another source can be used.”

Mark Knudson, P.E. – CEO
Tualatin Valley Water District Co-chair, Oregon Resilience Plan for Water & Wastewater Systems

Program Timeline

Developing the new Willamette water source will take over a decade.

Willamette Water Supply Program

Willamette Water Supply Program