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Water Treatment Plant
Our mission is to provide the citizens of Lake Oswego and Tigard with safe, pure, good tasting water at reasonable rates and adequate supply.
The Lake Oswego Tigard Water Treatment Plant produces high quality drinking water for more than 90,000 customers every day.
Lake Oswego's drinking water originates in the Clackamas River watershed.
Lake Oswego's drinking water is made clean and safe using a state-of-the-art treatment process known as conventional filtration, plus ozone. Read on to take a look inside the heart of the water treatment process.
Your drinking water is clean and safe. Get to know your drinking water by reviewing the latest 2022 Water Quality Report! Review the report by June 30, 2022 and you could win $100 off your next utility bill!
During an emergency, such as a major earthquake, the City of Lake Oswego may issue a "boil water notice" until it can verify that the water is not contaminated and is safe to drink. During a "boil water notice" period, any water used for drinking or food preparation should be boiled at a full rolling boil for at least one full minute.
The Water Management and Conservation Plan for the City of Lake Oswego and the City of Tigard was created to document the development and implementation of water management and conservation policies and programs that ensure sustainable water use for the community members of both cities.