Septic Systems

Delta County requires that a permit be issued for the installation, repair, replacement or alteration of any new or existing on-site wastewater treatment systems (OWTS), formerly known as individual sewage disposal systems (ISDS), in Delta County.

New Systems

Download the on-site wastewater treatment system (OWTS) application. Completed applications should be returned to the Delta County Health Department. Please note that you must apply for and obtain the Access/Address Permit before obtaining the on-site wastewater treatment system (ISDS) permit "Final Approval." For more information, see the Application Instructions, Development Application and Development Permit Fact Sheet.

Repairs, Alteration, and Replacement Systems

All major repairs, replacement, alterations of existing OWTS require a permit. An on-site wastewater treatment system (OWTS) application must be filled out and submitted to the Delta County Health Department prior to construction. For more detailed information, see the OWTS Instructions.

Related Forms and Information

Return to the Planning and Community Development web page.
Return to the Environmental Health Department web page.