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Sewer Permits, Inspection, Fee Schedules and Installation


A sewer permit must be issued to install a new connection, extension of an existing connection or for a repair or replacement of existing connection. You can view Sewer Application and Plan Checklists for a summary of requirements to obtain a permit.

Sewer Permits & Inspection

Sewer permit applications can be obtained at the County Courthouse, via mail by request, or at this link: Sewer Permit Application.

A side sewer plan must be submitted to the County for review and denote materials and standards for side sewers. View a sample gravity sewer plan. This plan should include the following elements:

  1. Surface accessible backwater valve (to be installed on all side sewers)
  2. Locations/ dimensions of buildings to be served and property boundaries
  3. Other underground utilities (water line separation 10' min)
  4. Cleanouts (required at foundations; 45 degree or greater direction/grade changes; every 100 ft. of sewer pipe)
  5. Length of sewer pipe from lateral to building (4" min for single residential dwelling; 6" for commercial))
  6. Location of septic tank
  7. Increasers or grease traps
  8. Residential buildings require 6"x4" reducer
  9. Vegetation as necessary
  10. Easements (if applicable)

Some properties may not be able to be served by gravity and will require a pressurized system. Contact the County for more information.

A Septic Decommissioning Permit from Clallam County Environmental Health Department must also be obtained prior to issuance of the side sewer permit. Septic systems must be decommissioned per WAC 246-272A-0300.

All work must be left exposed for inspection prior to cover. You can schedule an inspection 24 business hours in advance by contacting:

        • Carlsborg: 360-417-2379
        • Clallam Bay/Sekiu: 360-963-2397

Fee Schedules

Current fee schedules for connection, permits, inspection and other applicable fees for the Clallam Bay/Sekiu, Carlsborg or EUGA sewer systems can be viewed here: Sewer Fee Schedule

Side Sewer Installation

Property owners are responsible for the cost of providing a 4" residential or 6" commercial side sewer. Click this link for a Contractor List experienced in excavating and septic system installation or request one from our office.