Clallam Bay / Sekiu Sewer System

The Sekiu Wastewater Treatment Plant (WWTP) and the Clallam Bay WWTP began operation in 1977. Both WWTPs use rotating biological contactors (RBCs) for biological treatment and ultraviolet (UV) disinfection systems. Treated wastewater is discharged by outfalls to the bay.

Sewer Ordinance

Clallam Bay/Sekiu Sewerage System provides service to residential, commercial and public customers. 

New sewer ordinance can be viewed here: Clallam Bay/Sekiu Sewer System

Clallam Bay / Sekiu Sewer Advisory Committee

This volunteer committee provide a vital input to the County regarding rates, planning and other important sewer utility functions. Meetings are open to the public, and take place quarterly on the 3rd Wednesday of the month at 3 pm in Clallam Bay unless a meeting cancellation is posted on this webpage. Meeting minutes and agendas are posted on county agenda center page.

Collection System Repair & Replacement Project

The Clallam Bay-Sekiu Sewer System receives significant inflow/infiltration of water in the system which leads to regular sewage overflow events. During the development of the General Sewer and Wastewater Facilities Plan (PDF) in 2018, the County prioritized pipe repair and manhole replacement projects that should greatly reduce or eliminate these events. The County was selected to receive a $6.2 million grant/loan package from the Department of Ecology to complete the repair projects in 2020-2023. View Project Maps (PDF) and estimated timeline; find information on the Project Alternatives (PDF), including a comparative cost analysis, considered by the County. 

The downtown Sekiu sewer pipe replacement portion is currently under construction.

Related Documents

Contact Information

Billing questions: 360-417-2370 
Permits, connection, rates, and other inquiries: 360-417-2441 or by email