Think of onsite septic systems like a sewage treatment plant, only much smaller. They store, treat and dispose of the things you flush or send down drains. There are many different types of systems. Some are simple, using only a tank and a drainfield. Others are more complex, requiring pumps, filters, or specially designed materials.
New Onsite Septic Systems
Building, splitting, or altering your property?
If you are developing your land, you may need to schedule a site evaluation with Whitman County Public Health to begin the permitting process.
Details on the permitting process are included in-detail below.
Current Onsite Septic Systems
Buying or selling property with a septic system?
A System Assessment Form, linked below, completed by a Licensed Evaluator is required prior to property transfer.
Licensed Installer, Pumpers, and/or Evaluators
Licensed installers, pumpers, and/or evaluators are those qualified to do the following:
- Installers: Install septic systems in Whitman County, including residential gravity, residential alternative, and commercial systems.
- Pumpers: Pump septic systems in Whitman County
- Evaluators: Evaluate septic systems in Whitman County, including locating septic tank and drainfield location and evaluating their condition
Installers, pumpers, and/or evaluators are required to submit an application for approval. Pumpers must disclose the number of pumping vehicles, dispatch locations, storage location and name and location of dumping facility.
Out of County Installers & Pumpers are those licensed to install and/or pump septic systems in another county in Washington State. By submitting the Out of County application, these professionals may receive a one-time installation and/or pumping permit for work in Whitman County.
Qualified Design Professionals are those qualified to design septic systems in Whitman County. Professional Engineers, or those with a Washington State Professional OSS Designer License.