Laws & Codes

• Jefferson County Code - Chapter 8.15 - On-Site Sewage Disposal Systems (PDF) (PDF)
• Jefferson County Sewage Management Plan (Adopted August 16, 2007) (PDF) (PDF)
• Washington Administrative Code - Chapter 246-272A - On-Site Sewage Systems

Jefferson County Policies

• Policy Statement Number 2021-02 (PDF)
  Program: Septic System
  Subject: Reduced setback to well or surface water to 75'

• Policy Statement Number 01-01 (PDF)
  Program: Wastewater
  Subject: Design Standards for Site Constructed Elevated Fixed Media Filter Vessels
• Policy Statement Number 1-89 (PDF)
  Program: On-Site Sewage Disposal
  Subject: Alterations, Additions, Repairs, Remodels, and New Construction/Certification of Occupancy
• Policy Statement Number 3-91 (PDF)
  Program: On-Site Sewage Treatment
  Subject: Vertical Separation
• Policy Statement Number 04-01 (PDF)
  On-Site Sewage Disposal
  Evaluation of Existing On-Site Sewage Systems
• Policy Statement Number 4-88 (PDF)
  Program: On-Site Sewage Disposal
  Subject: Pit Privies
• Policy Statement Number 93-04 (PDF)
  Wet Season Evaluation Policy
• Policy Statement Number 93-05 (PDF)
  Drainfield Easement
• Policy Statement Number 97-02 (PDF)
  Program: On-Site Sewage
  Subject: Minimum Land Area Requirements
• Water / Sewer Line Crossing Policy (PDF)