Septic Maintenance

The Zoning Department administers the Winnebago County Sanitary Ordinance and Chapter Comm.83 of the Wisconsin Administrative Code, which regulate the installation and maintenance of Private Onsite Wastewater Treatment Systems (POWTS), better known as "septic systems."  Both the Winnebago County Sanitary Ordinance and Comm.83 require that all septic systems, regardless of when they were installed, must be inspected/serviced a minimum of once every three (3) years.

Maintenance involves the visual inspection of the system by a licensed master plumber, master plumber-restricted service, certified POWTS inspector, registered POWTS maintainer, or licensed pumping service, and includes pumping of the septic tank(s) and pump chamber (for dosing, in-ground, at-grade, and mound systems) by a licensed pumping service.  Your system may include an effluent filter on the outlet of the septic tank or may have a filter in the pump chamber.  If so, that filter must be cleaned.


Text Size

  • Increase
  • Decrease
  • Normal

Current Size: 100%


Oshkosh:(920) 232-3344
Neenah:(920) 727-2880
Fax:(920) 232-3347


8:00am - 4:30pm, M - F

Permit Issuing Hours

Walk in hours
8:00am - 10:00am

Other hours are available by appointment.

Mailing Address

County Zoning Office
Attn (list staff name)
112 Otter Ave
Oshkosh WI 54901