On-Site Wastewater Treatment Systems

NEW: Jefferson County EHS is in the process of revising its onsite wastewater treatment system (OWTS) regulations. View this webpage for more information.

About OWTS

Unlike the cesspools on grandpa's farm, the modern on-site wastewater treatment system, or OWTS, is an environmentally sound method of wastewater disposal in areas where public sewers are not available. These are also referred to as septic systems. Since many homeowners have little or no experience with an OWTS, these pages will provide information to help you understand how your OWTS functions and ways you can help improve its operation.

Basic OWTS Rules

  • For the 2018 Jefferson County OWTS regulations, click here.
  • Jefferson County requires permitting for use, operation and maintenance of onsite wastewater treatment systems. To find the different forms and permits required, click here.
  • Do not dispose of items that will destroy the natural digestion processes in your OWTS.
  • Do not overload the system with excessive water.
  • Have the tank regularly inspected and pumped.

If you adhere to these few simple rules, your OWTS will prove to be a safe and economical on-site method for disposing of your rural wastewater. 

Access Documents & Records

You can now get immediate access to septic system documents and records, including septic tank locations through our new online lookup application. You can now view, print and save your records. It's quick and easy! View the tutorial.

Additional Documents

  1. Memo Re: OWTS Regulation Changes Effective May 4, 2018
  2. Indian Hills Groundwater Report 2016 (PDF)
  3. Indian Hills Resolution August 17, 1979 (PDF)
  4. Interim Policy for Indian Hills Permitting Requirements - Parmalee Gulch Area (PDF)
  5. Septic System Maintenance Brochure (PDF)
  6. Septic Smart Holiday Tips

For additional OWTS policies, visit the Board of Health Policies page.