Private Onsite Septic Systems

Private onsite wastewater systems requirements for Washington County:

When is a Septic System Required

  • Building a new home
  • If there is a complaint filed
  • When a home sells and a Time of Transfer is required
  • When any part of the existing system needs replaced

Onsite Wastewater Assistance Program (OSWAP)

Helpful Downloads

  1. BOS-CONTRACTOR
  2. Chapter 66 (PDF)
  3. Chapter 69 (PDF)
  4. How to Care for Your Sand Filter (PDF)
  5. Sand Filter Checklist (PDF)
  6. Sand Filter Diagrams (PDF)
  7. Time of Transfer Exemptions (PDF)
  8. Time of Transfer Inspector List (PDF)