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• RBC process is outdated and will not meet future water quality standards


