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  • Individual Sewage Disposal Systems


    Unlike the cesspools on grandpa's farm, the modern individual sewage disposal system, or ISDS, is an environmentally sound method of wastewater disposal in areas where public sewers are not available.

    Prior to the sale of properties with onsite wastewater treatment (septic) systems, owners must have those systems inspected and obtain a Use Permit from the Department.

    This applies to systems that were installed more than 5 year prior to the sale date. Since many homeowners have little or no experience with an ISDS, this page provides you with information to help you understand how your ISDS system functions and ways you can help improve its operation, such as:

    • Do not dispose of items that will destroy the natural digestion processes in your ISDS
    • Do not overload the system with excessive water
    • Have the tank regularly inspected and pumped.


    If you adhere to these few simple rules, your ISDS will prove to be a safe and economical onsite method for disposing of your rural wastewater. To learn more, see our other pages on ISDS systems.

    See our Environmental Health Services Forms and Applications page, Individual Sewage Disposal System section, for all of the associated documents on individual sewage disposal systems.

    NEW - 2013-2014 Septic System Regulation Revision Process

    Last Updated: 3-20-2014