Below are EPA's National Pollutant Discharge Elimination System (NPDES) final permit and supporting documents for the U.S. Naval Air Station Whidbey Island, Seaplane Base Lagoon wastewater treatment plant discharging to Crescent Harbor (Puget Sound) in Oak Harbor, Washington.

• Permit number: WA0026760
• Effective date: December 27, 2018
• Permit expires: December 26, 2023

Note: The permit for this facility was previously issued by the Washington Department of Ecology. For more information about past permitting activities, visit Washington's Water Quality Permitting and Reporting Information System (PARIS) for Oak Harbor Sewage Treatment Plant.Exit

• Whidbey Island Naval Air Station Ault Field Wastewater Treatment Plant

• NPDES Permit, Whidbey NAS Seaplane Base Lagoon, Washington, #WA0026760 (PDF)(36 pp, 912 K, July 30, 2018)
  Final permit.
• NPDES Permit Fact Sheet, Whidbey NAS Seaplane Base Lagoon, Washington, #WA0026760 (PDF)(63 pp, 1 MB, March 2018)
  Technical basis for NPDES permit.
• Response to Comments, NPDES Permit for Whidbey NAS Seaplane Base Lagoon, Washington, #WA0026760 (PDF)(7 pp, 83 K, May 2018)
  EPA's responses to public comments received on the March 2018 draft permit.