The Division of Industry Services (DIS) Private Onsite Wastewater Treatment Systems (POWTS) Program protects public health and the waters of the state by regulating onsite wastewater treatment and recycling systems, and by promoting the use of the best available technology to provide onsite sewage treatment system solutions for property owners.
DIS coordinates with local certified municipalities and counties which provide plan review for certain types of installations. If a municipality wants to become a delegated agent, please visit the
Delegated Agents page.
The POWTS program is offering a monthly POWTS Update via Zoom. Each update will provide one hour of continuing education credit for certain POWTS credentials. They will be free to attend but you must pre-register so you will receive a link to the meeting. The updates will be held the 2nd Tuesday of each month at 9:00 AM.
Register online here: https://bookwhen.com/wipowts
In-Person soils training is also available from DSPS. Go to this website to see dates and locations and to get registered: https://bookwhen.com/wipowts
Start at the
Plan Review page for information about the types of plan reviews required and how to submit electronically. Also check the
Delegated Agent List to see if you can submit your plan review to the local municipality in lieu of DIS.
Plan Which Can Only Be Submitted to DIS
Plans Which Can Be Submitted to DIS or a Designated Agent
Plans Which Should Be Submitted to the Local Government Unit
Visit Public Lookup on eSLA to find approvals for plumbing products.
Counties have the primary responsibility to inspect POWTS, with the exception of state-owned projects.
Administrative Rules & Statutes
Trades Program Information
Inspection District Map
POWTS License Lookup and Renewal Information
EPA - Septic Systems
Resources from the UW-Madison Department of Soil Science Small Scale Wastewater Management Program
National Environmental Services Center - Septic System Information
Video - Is your septic failing?