Household and remodel debris is fine. The real limits come from King County, which publishes a long restriction list for its own facilities, and those restrictions decide what your load may contain.
Nothing hazardous goes in: no pesticides, no motor oil, no solvents, and no fuel. Paint is accepted only when it is latex, free of mercury and lead, and fully dried out. Propane and other compressed gas tanks are taken only if they are completely empty and no bigger than two gallons. Fluorescent tubes and mercury bulbs are not accepted for disposal at all, and televisions, computers, monitors, and laptops are flatly refused.
Several construction materials have their own catch. Treated wood, meaning anything painted, stained, or preserved, is not accepted from businesses. Asbestos needs county clearance before it moves. Bulky dense items over two feet in each direction and heavier than 200 pounds, such as concrete blocks and stumps, need clearance too. Nothing longer than eight feet is accepted. Tires are refused from business customers.
County code also bans a short list of readily recyclable construction materials from the landfill outright: clean untreated wood, cardboard, metal, new gypsum scrap, asphalt paving, brick, and concrete. Drywall pulled out during a remodel can still be landfilled, which surprises people. When you are not sure which side of the line a material sits on, your account manager will check it before the container arrives.