Our mission is to provide the citizens of Lake Oswego and surrounding areas with safe, pure, good tasting water at reasonable rates and adequate supply.
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The City of Lake Oswego supplies water to more than 36,000 customers within Lake Oswego including wholesale water customers like the cities of Tigard and Portland, and the Lake Grove, Glenmorrie, and Skylands Water Districts.
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The City of Lake Oswego treats water by pumping raw (river) water from our Clackamas River intake at Gladstone, under the Willamette River to the Treatment Plant in West Linn. When the water reaches the plant it receives doses of chemicals that help to make it safe. Chlorine is added to begin the process of disinfecting the water. Alum (aluminum sulphate) is the primary coagul
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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.
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