In Wisconsin you're allowed 200 gallons/person in the household. Poor record keeping and an exhaustive quality control regimen makes prosecution difficult.
...200 gallons/person/year...
Most states, and the Fed allow up to 100 gallons of beer and/or wine per household for one adult (200 gallons per household if there are two adults in the household).
The Feds don't like stills they can't regulate. Home distilling is basically illegal in the eyes of the Fed, unless you've asked the Fed's permission and paid the Fed's fees. Personal production of beer, wine, and distilled spirits per the Fed.
Wisconsin law allows fermented beverages (beer and wine), but there is no allowance in WI law for home distilling. Be careful out there.