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The City of Lake Oswego operates and maintains a Water Treatment Plant in West Linn, as well as a distribution system, a water conservation program, and a cross connection control program.
Water plays a vital role in everyone’s life. The Water Department’s mission is to bring healthy drinking water of the highest quality to Lake Oswego’s residential and wholesale customers from our intake facility on the Clackamas River in Gladstone, all the way to your tap.
Your drinking water is clean and safe. Get to know your drinking water by reviewing the latest 2022 Water Quality Report!
June 9, 2021 marked five years since the new Lake Oswego Tigard water system started providing high-quality drinking water to almost 100,000 customers throughout Lake Oswego and Tigard! Watch Lake Oswego Mayor Buck and Tigard Mayor Snider reflect on how important this partnership has been – and continues to be – for both communities. Let’s celebrate securing our most valuable resource for our cities’ future: investing in public health and preparing our cities for the long-term.
One of the most important things a homeowner can do to save water is make sure equipment is functioning appropriately and efficiently. The City offers free water audits to help community members find ways to use less water. Water audits are performed during the spring and summer seasons when watering yards begin.
The City is updating outdated, manually-read water meters to a new, wireless-read technology. These smart meters support efficiencies in our water system. We are replacing nearly 12,000 residential meters city-wide. More than 3,000 meters have already been installed in the northwest corner of the city.
In early 2023, contractors are installing meters in the Forest Highlands, North Shore Country Club, Evergreen and First Addition neighborhoods, working clockwise towards the remaining neighborhoods on the south side of the lake.
The main source of lead in drinking water is typically from household plumbing or components associated with service lines. 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. For questions about lead testing or your drinking water, call the Water Treatment Plant at 503-635-0394.
Backflow devices separate potable water from non-potable water sources such as irrigation systems, medical equipment, and private pump systems.
City personnel can assist with water shut-offs for home/business owners in the case of a leak, needed repair, or emergency.
Lake Oswego's drinking water originates in the Clackamas River watershed.
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 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.
The cities of Tigard and Lake Oswego jointly share the costs of operating and maintaining a water treatment plant and supply system that provides high-quality drinking water year-round to both communities.
Interested in learning more about your drinking water quality? Have a water quality concern? Read on for helpful information.
New to town and need to start your Utility Services? Or just have a question about your Utility Bill, water service, leaks, or consumption information, the Utility Bill Information page has links to everything that you will need to start, stop, understand and find out more about your Utility Bill and Services.
Lake Oswego's Interactive Maps allow the user to navigate the map by zooming in and out, search the map by address, tax lot number, or intersection, turn layers on and off, click on a property or other features to obtain information.
The water meter is a City owned device that measures the quantity of water used by a citizen or business. It is the device that meter readers read for every billing cycle to determine water usage.