Lumber, drywall, plaster, lath, roofing, siding, flooring, cabinets, trim, fixtures, carpet, and general cleanout junk all load fine. Wisconsin's own rules and the county's acceptance list set the limits.
Wisconsin bans a long list of materials from landfills and incinerators, and the Department of Natural Resources is explicit that the bans apply everywhere in the state, at home and at work. Electronics, lead acid batteries, major appliances, used oil filters, waste oil, and waste tires are all on it.
Yard waste is on the list too, including grass, leaves, garden debris, and brush under six inches across. That material goes to an approved compost site rather than into a container.
The county adds its own refusals. Stone, brick, concrete, soil, sand, gravel, sod, tree stumps, telephone poles, railroad ties, boats, and campers are not accepted at the Oshkosh facility, and neither is anything containing asbestos.
Hazardous waste, liquids, solvents, fuel, oil-based paint, and aerosols all stay out of a standard container and go through the county's hazardous materials program instead. When an item has you unsure, ask your account manager first.