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About the Water Treatment Plant

City of Lake Oswego Oregon Official Website

The City of Lake Oswego Water Treatment Plant is a direct filtration plant whose current treatment capacity is 16 MGD (million gallons of water per day). 

For more than 41 years the City of Lake Oswego Water Treatment Plant (WTP) has supplied its customers high quality water.  We hope that you the consumer can gain additional information and knowledge by using this web site. We look forward to the next 41 years.

The plant was constructed in 1967 in what was then unincorporated Clackamas County. It had an initial treatment capacity of 10 million gallons per day (MGD). The plant was expanded in 1980 to its present-day treatment capacity of 16 MGD. The source of all the City's water is the Clackamas River in Gladstone.

The Water Treatment Plant is staffed with seven full-time operators, keeping the plant running smoothly every day of the year.  Our operators are all fully certified and continue to upgrade skills and learn the newest treatment techniques through continuing education opportunities.