Septic permit rules and requirements in Wisconsin
In Wisconsin, the state sets the rule. The septic permit comes from your county. For some systems the state issues it itself. The code is Wis. Admin. Code ch. SPS 383. Wisconsin Administrative Code § SPS 383.21 · checked 2026-09-12
Private Onsite Wastewater Treatment Systems (POWTS) Program
Writes the rules
checked 2026-09-23
Your county
Issues the permit
checked 2026-09-12
Wis. Admin. Code ch. SPS 383
Code section
checked 2026-09-23
Who decides a septic permit in Wisconsin
Your county issues an ordinary residential permit. For some systems the state issues it itself. The state sets the floor through the Private Onsite Wastewater Treatment Systems (POWTS) Program, Division of Industry Services, Wisconsin Department of Safety and Professional Services.
The rule sends most applications to the local unit. It approves or denies the permit. The department decides instead for land the state owns.
Wisconsin Administrative Code § SPS 383.21 · checked 2026-09-12
The office publishes its own page on this: Wisconsin Department of Safety and Professional Services — Private Onsite Wastewater Treatment Systems (POWTS) Program.
The page's own canonical link names this address.
Wisconsin Department of Safety and Professional Services — Private Onsite Wastewater Treatment Systems (POWTS) Program · checked 2026-09-23
The floor state law sets
The rules that govern every septic system in Wisconsin are Wis. Admin. Code ch. SPS 383. Every local permit is issued under them.
It sets rules for building and running these systems. The goal is to protect public health and clean water.
Wisconsin Administrative Code, Chapter SPS 383 — Private Onsite Wastewater Treatment Systems · checked 2026-09-23
Wisconsin counties on this site
We have not published a Wisconsin county page yet. A county earns a page when we hold facts unique to it. Until then this page is the answer for every county in the state.
Telling us your county is how we decide which one to build next.
Sources
State records only. Each figure above has a government source and a checked-on date. County figures live on the county pages.
Verify before you act. Septic rules are set locally and they change. Check anything here with your county before you spend money on it.