Maintenance and Motor Pool
503-635-0280
Maintenance Center
17601 Pilkington Rd
Lake Oswego OR 97035
Water Treatment Plant
503-635-0394
Water Conservation
503-675-3747
Public Works
The Lake Oswego Public Works Department is responsible for maintaining infrastructure systems throughout the City to ensure they are working correctly, efficiently, and that the life of our assets is maximized. Streets, Water, Sewer, Stormwater, Motor Pool and City Beautification maintenance programs make up the department with each responsible for their own infrastructure system.
Here at Public Works, we take pride in providing utility maintenance to help make Lake Oswego a great place to live.
News & Announcements
Have you considered evaluating your existing outdoor watering system? A water use assessment performed by a professional can help save money and water by addressing watering inefficiencies. The City of Lake Oswego Water Conservation Program is now offering up to $200.00 in utility bill credit to cover all or part of the cost of a water use assessment. A water use assessment should help optimize existing irrigation systems and landscaping to meet water-saving practices.
The program is available first-come-first-served to Lake Oswego water customers. Act soon, as space is limited.
Some home systems—like irrigation, hot tubs, pools, or private wells—can accidentally allow water to flow the wrong way and mix with our drinking water supply. This is called “backflow,” and it can cause contamination. To help keep our drinking water safe, homes and businesses with these types of connections are required to have a backflow prevention device installed. This device must be tested once a year by a certified tester.
In Lake Oswego, backflow testing is due by July 15.
Looking for a fun and educational activity the whole family can enjoy this spring and summer? Join us for Stormwater Bingo, a creative way to explore your community, learn about stormwater, and WIN FUN PRIZES—running from May through the end of August!
Stormwater Bingo is a great way to get outdoors, discover how stormwater impacts our environment, and complete exciting challenges along the way. You can pick up a Bingo card at City Hall, LORAC or the Library. You can also download and print your own card online!
Interested in learning more about your drinking water? Every drop begins in the Clackamas River — one of Oregon's most pristine water sources.
Discover where your water comes from by signing up to one of our water treatment plant tours! It's a great opportunity to see the process firsthand, meet the team, and deepen your connection to the water you rely on every day.
Tours are held about once a month between spring and summer, take approximately 1 ½ hours and are limited to 15 people per tour.
There is no such thing as a flushable wipe – even the ones that say flushable. “Flushable” wipes cause serious damage to sewer systems and homes because they don’t break down or dissolve, clogging sewer pipes, damaging equipment, and causing expensive repairs for homeowners and our public sewer system.
Do not flush wipes! The only items that should be flushed down the toilet are toilet paper and human waste. Other items, like wipes, should be thrown in the trash.
We want your help in making community streets a safer and more comfortable place. While staff work diligently on addressing issues that are spotted, we understand that we can’t catch everything. If you have a concern related to traffic, please use this form to report issues
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 2026 Water Quality Report.
Proper disposal of fats, oils and grease protects your home, business, public health, and the environment.
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