Applications & Fees
Septic Program
Permit Fees Increasing effective January 1, 2025
On November 12, the Lewis County Board of County Commissioners approved increases to certification and permit application fees to help balance budgets for the departments of Community Development, Public Works and Public Health & Social Services.
The fee increases will go into effect on January 1, 2025. The adopted fee schedule is available now by request and will be available online after January 1st.
To request a septic system construction final inspection, please call the Septic Inspection line at (360) 740-1330.
Onsite Septic Homeowners Handout
The On-site Sewage Program is responsible for evaluating site conditions for onsite septic systems, characteristics of soil in test pits, setting permitting conditions, and issuing permits for septic systems. On-site Program staff review and comment on land development projects and activities such as Subdivisions, Special Use Permits, Boundary Line Adjustments, SEPA documents, and other planning processes proposing on-site wastewater treatment and disposal.
We follow regulatory mandates and guidance documents from the State Legislature, Washington State Department of Health, the Environmental Protection Agency (EPA), and Lewis County Codes.
To learn more about how a Septic System works, please see Land Use Fact Sheet #2