Most remodeling and cleanout debris is fine to load. Wisconsin's landfill bans are the main thing to plan around.
The Wisconsin Department of Natural Resources' banned materials list keeps these items out of landfills: electronics, lead-acid batteries, major appliances, used oil filters, waste oil, and waste tires. Yard waste is banned too, including grass, leaves, garden debris, and brush under six inches across. So are common recyclables like cardboard, cans, glass bottles, newspaper, office paper, and #1 and #2 plastic containers.
Mequon residents can drop off TVs, computers, printers, and cell phones at the electronics recycling area at the Department of Public Works, 10800 N Industrial Drive. Large appliances, batteries, and fluorescent bulbs aren't taken there.
The usual limits apply as well: no hazardous waste, liquids, paint, solvents, fuel, or asbestos in a standard dumpster.
If you're not sure about an item, ask your account manager before it goes in.