Lake Oswego water remains safe to drink and use. A regional chlorine shortage has disrupted supplies. The City is monitoring the situation and asking everyone to use water wisely and reduce usage. Learn more.

Public Works & COVID-19

For the City of Lake Oswego, the health and wellbeing of our community is our top priority. This includes our daily, commonly out of sight city services, like drinking water and sewer.

Quality Water
First and foremost, our drinking water is safe. You can rely on us to continue to deliver safe drinking water to your tap throughout the COVID-19 emergency. The Center for Disease Control and Prevention has found that “the COVID-19 virus has not been detected in drinking water. Conventional water treatment methods that use filtration and disinfection, such as those in most municipal drinking water systems, should remove or inactivate the virus that causes COVID-19.” Our comprehensive water treatment process utilizes conventional treatment plus ozone, filtration, and chlorine disinfection, providing multiple barriers that remove and inactivate viruses, bacteria, and other harmful organisms from the drinking water. Water is an essential service that we all rely on and we, as a City, will continue to ensure its reliability.

Read more about our quality water and the water treatment process.


Safe Return to Service for Buildings that Have Been Closed as a Result of COVID-19

The water produced by the Lake Oswego-Tigard Water Supply system is safe to drink and is not impacted by the COVID-19 pandemic. However, an additional consequence of the pandemic is reduced water use in buildings that have been closed or have greatly limited operations. Letting water sit in pipes for long periods of time can have a negative impact on your building’s water quality, resulting in conditions that allow the growth of bacteria. Harmful bacteria, such as Legionella, can grow in water systems under these conditions. Legionella can make people sick when inhaled into the lungs. If your building has been closed or partially closed, it's best to flush your pipes

While the City is responsible for getting quality water to your home or business, you are responsible for maintaining the water quality once it enters your building.

The Lake Oswego-Tigard water supply system recommends that buildings reopening after an extended closure follow the “Guidance for Reopening Building Water Systems after a Prolonged Shutdown” in the attached letter from the Oregon Health Authority.  If you have questions or concerns about reopening your building or your water quality, we are here to help.  Please contact us at  


Protecting our Wastewater (Sewer) System
Reminder to all our customers: paper towels, baby wipes, and “disposable wipes” can clog your pipes. These products do not dissolve and can clog sewer pipes, causing expensive - and time consuming - repairs for homeowners. These products also clog the larger public sewer pipes and pump station equipment which, in turn, leads to sewer backups. Save yourself and our collection system by placing wipes, rags, and towels in the trash, not the toilet!

Currently, Public Works and City Operations do not have service interruptions. If you need to report an issue or have questions about Public Works infrastructure (streets, storm, water, sewer, etc), please contact Public Works by phone at 503-635-0280.

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