Oak Harbor Clean Water Facility Planning

Existing Treatment Facilities

The City of Oak Harbor operates two wastewater treatment facilities, which serve approximately 24,000 users.

Lagoon Facility

•    Located on Seaplane Base
•    Handles 100% of City’s wastewater with outfall to Crescent Harbor
•    Facility is nearing system capacity
•    Existing system will not meet future water quality standards
•    Expansion/improvements limited due to sensitive environment (wetlands)

Rotating Biological Contactor (RBC) facility

•    Located next to Windjammer Park
•    Functions as a pre-treatment plant for up to 20% of City’s wastewater
•    Aging facility that is starting to fail
•    RBC process is outdated and will not meet future water quality standards