Once an approved septic system is installed, DES will inspect the newly-constructed system. The septic system must be installed by an individual permitted to do so by DES, unless an individual homeowner does the work for his/her own home. Prior to using a septic system, both an Approval for Construction and an Approval for Operation must be obtained.
To prevent pollution of all public or private water supplies, whether underground or surface sources. Subsurface sewage disposal (septic systems) must be designed, installed, operated, and maintained properly to ensure adequate protection of public health and the environment.
A DES inspector will inspect the newly-constructed septic system and evaluate the system to ensure that it has been installed in accordance with the intent of the approved plan. Once the inspector has determined that the system meets all applicable requirements, a written Approval for Septic System Operation will be completed, with a copy provided to the owner, municipality, and DES.
There is no application form, however, a written request for inspection must be made from the installer (or owner if it is a homeowner installation).
There is no fee for an Approval for Operation.
DES will inspect the newly-installed system within seven business days after receipt of a written request for inspection from the installer (or owner if it is a homeowner installation).
There is no expiration date for operation approvals.
DES must review and approve amended and revised plans prior to issuing an Approval for Operation. Please see the fact sheet Amended/Revised Plans for Subsurface Sewage Disposal Systems .
A Transfer of Ownership Application is available when the property changes ownership.
Status of Current Applications
Application, Designer, and Installer Search
The List of Permitted Designers and Installers is available on the DES OneStop database.
Subsurface Systems Bureau website or (603) 271-3501.
Adobe Acrobat Reader format. Download a free reader from Adobe.
Microsoft Word format. Download a free viewer from Microsoft.