DEM OWTS (Septic System) Permit Search (after 1990)

Welcome to Rhode Island's online DEM Onsite Wastewater Treatment System (OWTS) application search.

This page searches permitting activities administered by the state after 1990 for OWTS applications. Proper design and installation is essential to protect public health and avert the potential adverse impacts of OWTS on water resources.

To search OWTS historical information or permit status, enter the appropriate information below and click SEARCH.

Permit expiration dates may have changed due to Tolling Statute. See the explanation on the DEM Website for details.

PDF images of file contents may be available for download for some records. This service is only available for conformed files. (Conformed files have been issued a Certificate of Conformance, which means the installed OWTS appears to substantially conform with the design and other requirements as indicated on the application, associated plans and specifications; and is approved for use.)

For more information, you may call the DEM at 401-222-4700 to set up an appointment to review a file or check on file availability for review. Office hours are Monday through Friday 8:30 AM to 4:00 PM. See for directions.

To search for information that is available for systems before 1990, please visit the DEM website.

If a permit has been granted a Certificate of Conformance by the DEM, you can download a copy of that certification as a PDF image. Conforming permits will have a 'Generate Certificate of Conformance' button when viewing the details of that permit. Click on the button to download the certificate.

  • DO NOT include Street, Avenue, Road in Street Name
  • DO NOT include Corp or Inc. in Corporate Name
Last updated 05-11-2021 07:57 PM
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