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
Our public works professionals make communities safer, healthier, more vibrant, and a better place to live. Meeting the needs of our community is what gives public works its sense of purpose.
During National Public Works Week (May 18-24, 2025), let's acknowledge and honor their relentless dedication and often unseen contributions. Take a few minutes to go behind-the-scenes with four Lake Oswego Public Works staff members. Learn how our Public Works team is advancing quality of life, public health, and well-being for everyone in our community.
Join us to celebrate Public Works Week by taking a tour of the Water Treatment Plant or visiting our Library for fun activities!
The City’s Stormwater Management Manual (SWMM) provides guidance and standards for the placement, design, and maintenance of structures used to control runoff, reduce flooding, and prevent pollution from contaminating our local waterways. The manual applies to stormwater management design for public and private development and redevelopment within the City of Lake Oswego.
The City has updated the manual based on stakeholder feedback and revised DEQ water quality requirements. The 2025 draft manual is available for public comment through May 30.
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.
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.
Over the past five years, the City has been replacing outdated, manually-read water meters to a new, wirelessly-read technology. These smart meters support efficiencies in our water system and improve customer service.
As of spring 2025, 99% of the 12,630 meters city-wide have been replaced. The majority of these are residential meters, with about 300 accounting for commercial meters. All new smart meters are expected to be installed and in service by end of 2025.
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Key Documents and Reports
Forms, Permits, and Applications