Source Water Information

Tualatin is responsible for providing reliable water to the community now and into the future. The City's current average daily water demand is approximately 4.3 million gallons per day with a maximum day demand of approximately 9.5 million gallons per day. 

 At build-out development, the anticipated average daily water demand will be approximately 6.5 million gallons per day with a maximum day demand of 14.2 million galls per day. 

The City of Tualatin purchases water from the Portland Water Bureau through a wholesale customer contract.

Portland Water Bureau receives and distributes water to Tualatin from two sources:

1. Bull Run Watershed
2. Columbia South Shore Well Field

For information on Portland Water Bureau operations including summer supply, climate change impacts and planning information please visit the Portland Water Bureau website.

The City of Tualatin also has a state licensed Aquifer Storage and Recovery (ASR) Well, which allows the City to inject water during low demand periods and recover the water during high demand periods in the summer.

Advisory Committees

The City of Tualatin is a member of the Regional Water Providers Consortium, a collaborative and coordinating organization to improve the planning and management of municipal water supplies in the greater Portland, Oregon metropolitan region. The Consortiums Board consists of elected representatives from it's members.

Tualatin is a partner in the Willamette River Water Coalition, which holds water rights in the Willamette River and is governed by a Board of Representatives from each of the four partners (City of Tigard, City of Tualatin, Tualatin Valley Water District and City of Sherwood).

Studies

The City of Tualatin contracted with HDR to perform a Financial Evaluation of Water Supply Alternatives in 2015.
Council Presentation 3-23-2015

Reliability and Redundancy

The City of Tualatin and Tualatin Valley Water District established an intergovernmental agreement to build an emergency pump station and intertie to ensure water service during emergencies in 2015. 

Regional Water Supply Projects

The Willamette River Water Supply project will serve the City of Hillsboro and Tualatin Valley Water District. Tualatin recently participated in a study to provide input on the portion of the supply line designated to go through the City of Tualatin. Please visit the Willamette River Water Supply website for more information.

The City of Tigard and the City of Lake Oswego partnered to upgrade and expand the water treatment facility for the benefit of both communities.