Most household and construction debris is fine to load. Oregon's landfill bans and the county transfer station's rules set the limits.
The Oregon Department of Environmental Quality bans several items from landfills: vehicles, large appliances, used oil, tires, lead-acid batteries, and computers, monitors, and TVs. DEQ warns that people who haul their own trash can be held liable for dumping any of these at a disposal site.
Some of those items still have a place to go. The Salem-Keizer transfer station takes appliances and tires for a per-item fee and recycles car batteries, most electronics, metals, and used motor oil at no charge.
Hazardous waste, liquids, paint, solvents, fuel, and asbestos aren't allowed in a standard dumpster. Keep TVs, computers, and batteries out of your load, and mention any appliances or tires when you book.
If something on your list seems borderline, ask your account manager first.