Restoration, clean up and miscellaneous punch list work continues on the Lakeview Boulevard Improvement Project through fall, with lane closures and shifting traffic patterns. Please plan for delays and allow extra travel time in this area until the project wraps up later this fall.
On September 2, 2025, the Lake Oswego City Council approved an ordinance to lower the speed limit on local residential streets and some neighborhood collectors in Lake Oswego from 25 miles per hour (mph) to 20 mph.
Reducing speeds through the 20 is Plenty program is a 2025 City Council goal. Lower speed limits on residential streets can lead to safer travel conditions for everyone using the street, as well as encouraging a more comfortable environment for people walking, rolling, and riding.
Did you know that water entering our storm catch basins flows untreated directly into our local creeks, rivers, lakes, and oceans untreated? That means pollutants like trash, motor oil, chemicals, and yard waste go straight into the environment—harming wildlife, our water supply, and the places we swim. Help keep our waterways clean by following this simple rule: Only rain down the drain.
Discharging the above is considered an illicit discharge and can result in fines.
Construction is now underway for new sidewalks along portions of Tree Top Lane, Overlook Drive, and Meadowlark Lane.
Please watch for lane closures, construction personnel, and equipment within the work zones. For all the latest, visit the project page.
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 2025 Water Quality Report.
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.
The City is implementing a new ADA curb ramp program to address accessibility gaps, enhance safety, comply with legal requirements, promote community inclusivity, and contribute to broader infrastructure modernization efforts. By implementing a comprehensive program, the City can create a more accessible and welcoming environment for everyone.
Lake Oswego, with Portland’s support, has been using a phased project approach to replace the aging Tryon Creek plant with an environmentally sustainable wastewater treatment facility, at a good value to the community. The first phase of the project is now complete, which included developing facility designs, preliminary permitting, and proposed pricing for the Wastewater Treatment Facility Project.
For the second phase of the project, Lake Oswego will explore a competitive procurement method using public financing, to complete the design, construct the facility, and operate and maintain the facility under a long-term contract.
For more information about the project, or to sign-up for e-news, click here.
Restoration, clean up and miscellaneous punch list work continues on the Lakeview Boulevard Improvement Project through fall, with lane closures and shifting traffic patterns. Please plan for delays and allow extra travel time in this area until the project wraps up later this fall.
On September 2, 2025, the Lake Oswego City Council approved an ordinance to lower the speed limit on local residential streets and some neighborhood collectors in Lake Oswego from 25 miles per hour (mph) to 20 mph.
Reducing speeds through the 20 is Plenty program is a 2025 City Council goal. Lower speed limits on residential streets can lead to safer travel conditions for everyone using the street, as well as encouraging a more comfortable environment for people walking, rolling, and riding.
Did you know that water entering our storm catch basins flows untreated directly into our local creeks, rivers, lakes, and oceans untreated? That means pollutants like trash, motor oil, chemicals, and yard waste go straight into the environment—harming wildlife, our water supply, and the places we swim. Help keep our waterways clean by following this simple rule: Only rain down the drain.
Discharging the above is considered an illicit discharge and can result in fines.
Construction is now underway for new sidewalks along portions of Tree Top Lane, Overlook Drive, and Meadowlark Lane.
Please watch for lane closures, construction personnel, and equipment within the work zones. For all the latest, visit the project page.
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 2025 Water Quality Report.
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.
The City is implementing a new ADA curb ramp program to address accessibility gaps, enhance safety, comply with legal requirements, promote community inclusivity, and contribute to broader infrastructure modernization efforts. By implementing a comprehensive program, the City can create a more accessible and welcoming environment for everyone.
Lake Oswego, with Portland’s support, has been using a phased project approach to replace the aging Tryon Creek plant with an environmentally sustainable wastewater treatment facility, at a good value to the community. The first phase of the project is now complete, which included developing facility designs, preliminary permitting, and proposed pricing for the Wastewater Treatment Facility Project.
For the second phase of the project, Lake Oswego will explore a competitive procurement method using public financing, to complete the design, construct the facility, and operate and maintain the facility under a long-term contract.
For more information about the project, or to sign-up for e-news, click here.
Water Treatment Plant
503-635-0394
Key Documents and Reports
Forms, Permits, and Applications