Waukesha County, Wisconsin septic permits and requirements

Permitting authority

Waukesha County Department of Parks and Land Use — Environmental Health Division

Waukesha County Department of Parks and Land Use, 515 W. Moreland Blvd., Waukesha, WI 53188; Environmental Health phone 262-896-8300.

Wisconsin POWTS framework

Wisconsin Department of Safety and Professional Services identifies counties as having the primary responsibility to inspect Private Onsite Wastewater Treatment Systems, except for state-owned projects. DSPS also provides the statewide sanitary permit application, soil/site evaluation forms, inspection forms, and POWTS plan-review resources used with local county administration.

Use current county and state approvals together

County sanitary permits are part of Wisconsin's POWTS regulatory system. Depending on system type and project scope, state plan approval or other review may be required in addition to the county permit. The county page below identifies the local filing path and should be checked before construction or alteration.

County sanitary permit authority

Waukesha County Environmental Health reviews POWTS plans, issues sanitary permits, inspects systems during construction, and administers maintenance requirements. The county identifies mound, at-grade, conventional/non-pressurized inground, pressurized inground, and holding-tank systems among the system types it regulates.

When a sanitary permit is required

The county states that a sanitary permit is required for any initial, modified, additional, or replacement private sewage system serving a public or private building. The licensed plumber responsible for installation completes and submits the sanitary permit application and fee.

Required permit submittal items

Waukesha County lists the sanitary permit application, original soil and site evaluation report, detailed POWTS design plans or approved plans when applicable, and—for new construction—a survey showing the building stakeout by a registered land surveyor as required elements of a complete application.

Preliminary review for additions and changes

A Preliminary Site Evaluation is required before county zoning and/or building permits for certain properties served by private sewage systems when remodeling, additions, changes in use, or accessory structures are proposed. The review checks isolation distances, existing system function, and whether wastewater loading will increase; additional soil and system-capacity review may be required for bedroom or commercial-use increases.

County maintenance program

Waukesha County states that all properties with septic systems are included in its maintenance program. Pumping and/or inspection frequency depends on system type, and owners should use the county maintenance program requirements for the specific system rather than assume a universal interval.

Official sources

SepticScope summarizes public-agency information for planning purposes. The permitting agency's current instructions control if they differ from this guide.