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Wastewater Service Verification and Connection

City of Lake Oswego

​Wastewater Verification

If you have a question about whether you are connected to the City sewer or a septic tank, we are able to check our records for you. If we are unable to find a record, we can perform a dye or smoke test for verification. Call the Wastewater Department at (503) 635-0280 to arrange an appointment.

Due to a high volume of real estate transactions this service can only be requested by the homeowner. All other parties requesting a dye or smoke test will be charged a fee of $60.00 per transaction.

​Wastewater Connection

If you are currently on a septic tank and would like to speak with someone about connecting to the City's Wastewater Collection System, please contact Todd Knepper, Planning Services Division - Engineering Department, at (503) 675-2534.