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Water Quality
Clean drinking water is an essential resource we rely on every day. Providing residents and businesses in Lake Oswego with safe, dependable, high-quality water is our top priority.
Lake Oswego’s tap water meets or exceeds every State and Federal standard for safe drinking water. Get to know your drinking water by reviewing the latest 2024 Water Quality Report.
Lake Oswego currently meets or exceeds all federal and state requirements for water quality testing. PFAS is an emerging issue that all water providers and systems across the nation are experiencing.
Fortunately, Lake Oswego's drinking water is at low risk for PFAS, and PFAS have not been detected in our drinking water distribution system.
Water served by the City of Lake Oswego is tested regularly to ensure every drop meets all federal and state safe drinking water standards, including those for lead. Lake Oswego’s water system has no known lead pipes or connections.
The main source of lead in drinking water is typically from household plumbing or components associated with service lines on the back side of the meter. We offer free lead testing to our water customers. If you are concerned about the levels of lead in your home, you can pick up a test kit and instructions at the 2nd floor reception desk at City Hall.
Questions about drinking water, water treatment, water distribution, or water quality? Check out our comprehensive Water FAQs!
Interested in learning more about your drinking water? Take a behind-the-scenes tour of the Lake Oswego-Tigard Water Treatment Plant, located in West Linn!
Tours are held about once a month between spring and early fall, take approximately 1 ½ hours and are limited to 15 people per tour.
