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Clallam Bay/Sekiu Sewer System

The Sekiu Wastewater Treatment Plant (WWTP) and the Clallam Bay WWTP both began operation in 1977. The Sekiu and Clallam Bay WWTPs are similar in design and both use rotating biological contactors (RBCs) for biological treatment. The chlorine disinfection system was replaced with an ultraviolet disinfection system at both WWTPs in 2004. Treated wastewater is discharged by outfalls to the bay.

Sewer Permits, Connection & Rates

Clallam Bay/Sekiu Sewerage System provides service to residential, commercial and public customers. New customers wanting to install new or additional connections to the sewer must provide a sewer plan for review to Public Works and obtain a sewer permit prior to installation. Current connection and usage rates can be found in Chapter 13.04 of the Clallam County Code.

Clallam Bay/Sekiu Sewer Advisory Committee

This volunteer committee providea vital input to the County regarding rates, planning and other important sewer utility functions. Meetings are open to the public, and take place every second Wednesday of the month at 3 pm at the Clallam Bay Fire Station unless a meeting cancellation is posted on this webpage. Meeting minutes and agendas are posted below.

The next meeting will be held: Wednesday, July 10th, 3 pm. Agendas and previous meeting minutes posted below.

General Sewer/Wastewater Facilities Plan Update

In April 2018, Clallam County Public Works contracted with Gray&Osborne, Inc. to author a General Sewer and Wastewater Facilities Plan (Plan) for the Clallam Bay/Sekiu Sewerage System to address the County’s planning needs for wastewater collection, transmission, treatment, and disposal for the 20-year planning period. The final draft has been approved by the Department of Ecology for review:

Clallam County is working with state and local agencies and the Clallam Bay/Sekiu community to plan and design improvements recommended in the Plan.

Meeting Agendas

Meeting Minutes

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